A method for determining the percentage content of erbium and tellurium in aluminum alloy by ICP-AES method

Abstract

The application provides a method for determining the percentage content of erbium and tellurium in aluminum alloy by ICP-AES method, which comprises the following steps: firstly, preparing one or more of erbium series working standard solution, tellurium series working standard solution and erbium tellurium series working standard solution with different concentration ranges; then, preparing aluminum alloy to-be-tested solution; then, scanning and determining the series working standard solution and the aluminum alloy to-be-tested solution by an inductively coupled plasma atomic emission spectrometer, and selecting the analysis spectral lines of erbium and tellurium; finally, establishing a corresponding working curve according to the intensity value and the concentration value of the selected analysis spectral lines of erbium and tellurium, obtaining a method linear equation, determining the aluminum alloy to-be-tested solution and obtaining the emission spectral line intensity of erbium and / or tellurium, and automatically calculating the percentage content of erbium and / or tellurium in the aluminum alloy by the inductively coupled plasma atomic emission spectrometer according to the working curve. The application can determine the percentage content of erbium and / or tellurium in the aluminum alloy, and the test range of erbium tellurium is 0.010-1.00%.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of analytical testing technology, in particular to a method for determining the percentage content of erbium and tellurium in aluminum alloy by ICP-AES method. BACKGROUND

[0002] Aluminum alloy has the characteristics of light weight, high strength, low cost, etc. Aluminum alloy has been widely used in key components such as aircraft skin, frame, wallboard, and support. According to research, the use of aluminum alloy in ships and marine equipment will help to reduce the weight of ships and marine equipment. Therefore, aluminum alloy has also received extensive attention in the research of ship and marine equipment materials.

[0003] The addition of erbium and / or tellurium elements in aluminum alloy can improve the performance of aluminum alloy, such as increasing the strength or plasticity of aluminum alloy, improving its heat resistance, and reducing its corrosion sensitivity. Erbium-containing aluminum alloy and tellurium-containing aluminum alloy both belong to emerging advanced materials and are still in the pre-research and experimental stage. There are no mature applications and related methods for determining erbium and / or tellurium, and no literature reports. The analysis method and detection characterization technology lag behind the material research and development. According to research, there is no report on the analysis method of erbium and / or tellurium elements in aluminum alloy at home and abroad. Among them, erbium is a rare earth element with low content in nature, special properties, and similar chemical and physical properties to other rare earth elements, which are difficult to separate and detect. Tellurium is a transitional semiconductor element between metal and non-metal, with special chemical and physical properties. At present, only more than ten papers on the determination of erbium content in laser crystal, pure titanium, zirconium uranium erbium alloy, and rare earth have been found. More than twenty papers on the determination of tellurium content in tellurium-copper alloy, steel and high-temperature alloy, rock mineral, and water quality have been found. In view of the fact that the matrix composition of the above determination objects has nothing to do with aluminum alloy, only a little reference can be provided in terms of method principle. According to the understanding, the relevant research units of erbium-containing aluminum alloy in the industry use design values or horizontal comparison methods to study the relationship between erbium content and alloy performance, and some are limited by technical blockade and do not provide related content sources. In summary, the existing detection technology lags far behind the research and development of erbium-containing and tellurium-containing advanced aluminum alloy. There are no method standards and literature reports on the determination of erbium and / or tellurium content in aluminum alloy at home and abroad, and there is no inductively coupled plasma atomic emission spectrometry analysis method for the determination of erbium and / or tellurium elements in aluminum alloy. At present, no ready-made method is available. The status of no available method and no standard to follow is not conducive to the research on the relationship between erbium content and performance of new-type erbium-containing and tellurium-containing aluminum alloy, product evaluation and quality control in the process of acceptance, and seriously restricts the research and application process of new-type aluminum alloy, and brings quality control risks to the safe service of materials. SUMMARY

[0004] The problem solved by the present application is that there is no method for determining erbium and / or tellurium elements in aluminum alloy in the prior art, which is not conducive to the research on the relationship between the content of erbium and / or tellurium and performance of new aluminum alloy containing erbium and / or tellurium, product evaluation and quality control in the process of acceptance, and seriously restricts the quality control in the process of research and application of new aluminum alloy, and brings quality control risks to the safe service of materials.

[0005] The present application discloses a method for determining the percentage content of erbium and tellurium in aluminum alloy by ICP-AES method, which is used for determining the percentage content of erbium and / or tellurium in aluminum alloy, and comprises the following steps:

[0006] The method comprises the following steps:

[0007] Step S1: one or more of erbium standard solution, tellurium standard solution and erbium-tellurium mixed standard solution are prepared, an aluminum-based solution is prepared, and then a series of working standard solutions are prepared by using the standard solution and the aluminum-based solution; the erbium standard solution is used to prepare an erbium series working standard solution with an erbium element concentration range of 0-10.0 μg / mL; the tellurium standard solution is used to prepare a tellurium series working standard solution with a tellurium element concentration range of 0-10.0 μg / mL; and the erbium-tellurium mixed standard solution is used to prepare an erbium-tellurium series working standard solution with an erbium element concentration range of 0-10.0 μg / mL and a tellurium element concentration range of 0-10.0 μg / mL;

[0008] Step S2: 0.0900-0.1400 g of aluminum alloy sample is weighed and placed in a 100 mL dual-purpose bottle, 5 mL of hydrochloric acid is added for dissolution, and then 1 mL of nitric acid is added for dissolution, and after heating and dissolution, the solution is taken out and cooled to room temperature, and then diluted to the mark with water, shaken and evenly distributed to obtain an aluminum alloy sample solution;

[0009] Step S3: one or more series of working standard solutions prepared in step S1 and the aluminum alloy sample solution prepared in step S2 are scanned and determined by an inductively coupled plasma atomic emission spectrometer, and the analysis spectrum of erbium and tellurium is selected according to the atlas, the degree of interference, whether the interference peaks can be distinguished, the signal-to-background ratio, and the test comparison of the series of working standard solutions containing erbium and / or tellurium;

[0010] Step S4: a working curve is established according to the intensity value of the erbium and tellurium analysis spectrum line selected in step S3 and its concentration value, and a method linear equation is obtained, then the aluminum alloy sample solution is determined and the emission spectrum line intensity of erbium and / or tellurium is obtained, and the inductively coupled plasma atomic emission spectrometer automatically calculates the percentage content of erbium and / or tellurium in the aluminum alloy according to the working curve.

[0011] Further, the series of working standard solutions include a blank solution and a plurality of working standard solutions, the blank solution does not contain erbium elements and tellurium elements, and the working standard solutions contain erbium elements and / or tellurium elements.

[0012] Further, step S1 comprises:

[0013] Step S11: Preparation method of aluminum-based solution: 0.100 g of high-purity aluminum is weighed, dissolved with 5 mL of hydrochloric acid and 1 mL of nitric acid, and then transferred to a 100 mL volumetric flask to obtain an aluminum-based solution;

[0014] Step S12: Preparation of an erbium series working standard solution using the erbium standard solution and the aluminum-based solution prepared in step S11, and / or preparation of a tellurium series working standard solution using the tellurium standard solution and the aluminum-based solution prepared in step S11, or preparation of an erbium-tellurium series working standard solution using the erbium-tellurium mixed standard solution and the aluminum-based solution prepared in step S11;

[0015] The preparation method of the erbium series working standard solution is as follows:

[0016] Step S121: Dilute 1 mg / mL of the erbium standard solution to 0.100 mg / mL and 0.01 mg / mL, respectively;

[0017] Step S122: Prepare 5 aluminum-based solutions according to the method of step S11, and place the 5 aluminum-based solutions in 5 100 mL volumetric flasks, respectively;

[0018] Step S123: Add pure water to the first volumetric flask to 100 mL scale to form a blank solution;

[0019] Step S124: Add 1 mL of the erbium standard solution with a concentration of 0.01 mg / mL to the second volumetric flask, and then add pure water to make up to 100 mL to form an erbium standard solution A, and the concentration of erbium in the erbium standard solution A is 0.10 μg / mL;

[0020] Step S125: Add 10 mL of the erbium standard solution with a concentration of 0.01 mg / mL to the third volumetric flask, and then add pure water to make up to 100 mL to form an erbium standard solution B, and the concentration of erbium in the erbium standard solution B is 1.0 μg / mL;

[0021] Step S126: Add 5 mL of the erbium standard solution with a concentration of 0.1 mg / mL to the fourth volumetric flask, and then add pure water to make up to 100 mL to form an erbium standard solution C, and the concentration of erbium in the erbium standard solution C is 5.0 μg / mL;

[0022] Step S127: Add 10 mL of the erbium standard solution with a concentration of 0.1 mg / mL to the fifth volumetric flask, and then add pure water to make up to 100 mL to form an erbium standard solution D, and the concentration of erbium in the erbium standard solution D is 10.0 μg / mL;

[0023] The preparation method of the tellurium series working standard solution is as follows:

[0024] Step S121': dilute 1 mg / mL tellurium standard solution into 0.100 mg / mL and 0.01 mg / mL tellurium standard solution respectively;

[0025] Step S122': prepare 5 aluminum-based solutions according to the method of step S11, and place the 5 aluminum-based solutions in 5 100 mL volumetric flasks respectively;

[0026] Step S123': add pure water to the first volumetric flask to the 100 mL mark to form a blank solution;

[0027] Step S124': add 1 mL of 0.01 mg / mL tellurium standard solution to the second volumetric flask, and then add pure water to make up to 100 mL to form a tellurium standard solution A, the concentration of tellurium in the tellurium standard solution A being 0.10 μg / mL;

[0028] Step S125': add 10 mL of 0.01 mg / mL tellurium standard solution to the third volumetric flask, and then add pure water to make up to 100 mL to form a tellurium standard solution B, the concentration of tellurium in the tellurium standard solution B being 1.0 μg / mL;

[0029] Step S126': add 5 mL of 0.1 mg / mL tellurium standard solution to the fourth volumetric flask, and then add pure water to make up to 100 mL to form a tellurium standard solution C, the concentration of tellurium in the tellurium standard solution C being 5.0 μg / mL;

[0030] Step S127': add 10 mL of 0.1 mg / mL tellurium standard solution to the fifth volumetric flask, and then add pure water to make up to 100 mL to form a tellurium standard solution D, the concentration of tellurium in the tellurium standard solution D being 10.0 μg / mL;

[0031] The preparation method of the erbium tellurium series working standard solution is as follows:

[0032] Step S121": dilute 1 mg / mL erbium standard solution and 1 mg / mL tellurium standard solution into 0.100 mg / mL and 0.01 mg / mL erbium tellurium mixed standard solution respectively;

[0033] Step S122": prepare 5 aluminum-based solutions according to the method of step S11, and place the 5 aluminum-based solutions in 5 100 mL volumetric flasks respectively;

[0034] Step S123": add pure water to the first volumetric flask to the 100 mL mark to form a blank solution;

[0035] Step S124'': 1 mL of the erbium-tellurium mixed standard solution with a concentration of 0.01 mg / mL is added to the second volumetric flask, and then pure water is added to make up to 100 mL to form an erbium-tellurium mixed standard solution A, and the concentration of erbium-tellurium in the erbium-tellurium mixed standard solution A is 0.10 μg / mL;

[0036] Step S125'': 10 mL of the erbium-tellurium mixed standard solution with a concentration of 0.01 mg / mL is added to the third volumetric flask, and then pure water is added to make up to 100 mL to form an erbium-tellurium mixed standard solution B, and the concentration of erbium-tellurium in the erbium-tellurium mixed standard solution B is 1.0 μg / mL;

[0037] Step S126'': 5 mL of the erbium-tellurium mixed standard solution with a concentration of 0.1 mg / mL is added to the fourth volumetric flask, and then pure water is added to make up to 100 mL to form an erbium-tellurium mixed standard solution C, and the concentration of erbium-tellurium in the erbium-tellurium mixed standard solution C is 5.0 μg / mL;

[0038] Step S127'': 10 mL of the erbium-tellurium mixed standard solution with a concentration of 0.1 mg / mL is added to the fifth volumetric flask, and then pure water is added to make up to 100 mL to form an erbium-tellurium mixed standard solution D, and the concentration of erbium-tellurium in the erbium-tellurium mixed standard solution D is 10.0 μg / mL.

[0039] Further, in step S3, the working parameters of the inductively coupled plasma atomic emission spectrometer are as follows:

[0040] Power: 1.00 kW-1.30 kW;

[0041] Plasma gas flow rate: 12 L / min-13 L / min;

[0042] Auxiliary gas flow rate: 1.0 L / min-1.1 L / min;

[0043] Atomizing gas flow rate: 0.70 L / min-0.80 L / min;

[0044] Pump speed: 12 rpm-13 rpm;

[0045] Stabilization delay time: 13 s-15 s;

[0046] Sample lifting time: 9 s-12 s;

[0047] Reading time: 5 s-6 s;

[0048] Number of repeated measurements: 2-3 times;

[0049] Observation height: 5-8 mm.

[0050] Further, the selected analysis spectral lines of erbium and tellurium in step S3 are as follows:

[0051] Er: 349.910 nm; 369.265 nm; Te: 214.282 nm; 238.579 nm.

[0052] The method for determining the percentage content of erbium and tellurium in aluminum alloy by ICP-AES method according to claim 5, wherein in step S4, in addition to the establishment of the method linear equation, the correlation coefficient, the relative standard deviation (RSD) and the detection limit are calculated.

[0053] Further, in step S4, under the conditions of power 1.2 kW, atomizer flow 0.70 L / min and plasma gas flow 12.5 L / min, the working curve linear equation of erbium Er 349.910 is y=4.87x10 4 x+77.92, the correlation coefficient r=0.9999; the working curve linear equation of erbium Er 369.265 is y=3.81x10 4 x+158.44, the correlation coefficient r=0.9999; the working curve linear equation of tellurium Te 214.282 is y=1.12x10 3 x+53.97, the correlation coefficient r=0.9993; the working curve linear equation of tellurium Te 238.579 is y=3.76x10 2 x+5.92, the correlation coefficient r=0.9994.

[0054] Further, the test range of erbium and tellurium is 0.010% to 1.00%, the relative standard deviation is less than or equal to 1%, and the detection limit is less than or equal to 0.0010%.

[0055] Further, the mass concentration of hydrochloric acid used is 36.0-38.0%, and the mass concentration of nitric acid is 69.0-71.0%.

[0056] Compared with the prior art, the method for determining the percentage content of erbium and tellurium in aluminum alloy by ICP-AES method and the test method have the following advantages:

[0057] 1. In the determination method, when the working parameters of the inductively coupled plasma atomic emission spectrometer and the analysis spectrum line are determined, the method linear equation can be determined by determining a series of working standard solutions, and then the percentage content of erbium and / or tellurium in the aluminum alloy to be tested can be determined by analyzing the aluminum alloy to be tested, thereby saving the analysis time and meeting the needs of scientific research and production.

[0058] 2. The determination method in this invention can analyze and determine the percentage content of erbium and tellurium in aluminum alloys using an inductively coupled plasma atomic emission spectrometer. It is simple to operate, accurate in results, and rapid in analysis, solving the problem of the lack of existing methods for determining the content of erbium and tellurium in aluminum alloys. It provides a rapid and accurate reference for the production control and application of aluminum alloys containing erbium and / or tellurium.

[0059] 3. The analytical method of the present invention has a correlation coefficient ≥0.999, a detection limit ≤0.0010%, and a relative standard deviation ≤1% for detecting erbium and / or tellurium. The present invention can meet the needs of determining the percentage content of erbium and tellurium in aluminum alloys. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the described embodiments are only some, not all, of the embodiments of this invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0061] Inductively coupled plasma atomic emission spectrometry (ICP-AES) is simple, rapid, and accurate. To address the lack of existing ICP-AES methods for determining the percentage of erbium and tellurium in aluminum alloys, this invention provides a method for determining the percentage of erbium and tellurium in aluminum alloys using ICP-AES. The method involves preparing a series of working standard solutions by adding erbium and / or tellurium standard solutions to a volumetric flask containing an aluminum-based solution. Under the defined operating conditions of the ICP-AES spectrometer, the series of working standard solutions are tested. Working curves are plotted with erbium and / or tellurium concentrations on the x-axis and the emission spectral intensities of erbium and / or tellurium on the y-axis. By measuring the emission spectral intensities of erbium and / or tellurium in the test solution of the aluminum alloy, the percentage of erbium and / or tellurium in the aluminum alloy is calculated, providing a basis and data support for the control of aluminum alloy quality and performance.

[0062] The instruments and equipment used in the following examples are conventional in the art. Test methods in the following examples, unless otherwise specified, are generally performed under standard conditions or as recommended by the manufacturer. All reagents and materials used in the following examples are commercially available products unless otherwise stated. 1 mg / mL erbium standard solution and 1 mg / mL tellurium standard solution are commercially available standard solutions.

[0063] A method for determining the percentage content of erbium and tellurium in aluminum alloys using ICP-AES, comprising the following steps:

[0064] Step S1: one or more of the preparation of erbium standard solution, tellurium standard solution, erbium tellurium mixed standard solution, preparation of aluminum-based solution, and then using the erbium and / or tellurium standard solution and aluminum-based solution to prepare a series of working standard solutions, using the erbium standard solution to prepare a series of working standard solutions with the concentration of erbium element ranging from 0 to 10.0 μg / mL; using the tellurium standard solution to prepare a series of working standard solutions with the concentration of tellurium element ranging from 0 to 10.0 μg / mL; using the erbium tellurium mixed standard solution to prepare a series of working standard solutions with the concentration of both erbium element and tellurium element ranging from 0 to 10.0 μg / mL; wherein the series of standard solutions include a blank solution and several working standard solutions, the blank solution does not contain erbium element and tellurium element, and the working standard solutions contain erbium element and / or tellurium element;

[0065] Step S2: weighing 0.0900-0.1400 g of aluminum alloy sample, placing it in a 100 mL dual-purpose bottle, adding 5 mL of hydrochloric acid to dissolve, then adding 1 mL of nitric acid, heating to dissolve, and after the sample is completely dissolved and the solution is clear, removing it, cooling to room temperature, diluting to volume with water, shaking well, and obtaining the aluminum alloy sample solution;

[0066] Step S3: scanning and measuring one or more series of working standard solutions prepared in step S1 and the aluminum alloy sample solution prepared in step S2 by inductively coupled plasma atomic emission spectrometer, selecting the analysis spectrum of erbium and tellurium according to the atlas, the degree of interference, whether the interference peaks can be distinguished, the signal-to-background ratio, and the test comparison of the series of working standard solutions containing erbium and / or tellurium;

[0067] Step S4: establishing a corresponding working curve according to the intensity value of the selected erbium and tellurium analysis spectrum and its concentration value, obtaining the method linear equation, then measuring the aluminum alloy sample solution and obtaining the emission spectrum intensity of erbium and / or tellurium, and the inductively coupled plasma atomic emission spectrometer automatically calculates the percentage content of erbium and / or tellurium in the aluminum alloy according to the working curve.

[0068] It should be noted that in step S1, when only the percentage content of erbium element needs to be tested, the erbium standard solution or the erbium tellurium mixed standard solution is prepared, when only the percentage content of tellurium element needs to be determined, the tellurium standard solution or the erbium tellurium mixed standard solution is prepared, when the percentage contents of erbium and tellurium need to be determined, the erbium tellurium mixed standard solution is prepared, or the erbium standard solution and the tellurium standard solution are prepared. In step S2, the volume is diluted to 100 mL.

[0069] In step S2, the mass concentration of hydrochloric acid is 36.0-38.0%, and the mass concentration of nitric acid is 69.0-71.0%. The above-mentioned hydrochloric acid + nitric acid dissolution method can ensure that the aluminum alloy substrate and the erbium and / or tellurium elements inside it are fully dissolved, so as to facilitate the detection of the percentage content of the components.

[0070] The embodiment provides a method for measuring the percentage content of erbium and tellurium in an aluminum alloy by using an ICP-AES method, which is used for measuring the percentage content of erbium and / or tellurium in an aluminum alloy, and comprises steps S1-S4 as described above,

[0071] In step S1, the following steps are included:

[0072] Step S11: Preparation method of the aluminum-based solution: 0.100 g of high-purity aluminum is weighed, dissolved in 5 mL of hydrochloric acid and 1 mL of nitric acid, and then transferred into a 100 mL volumetric flask to obtain an aluminum-based solution;

[0073] Step S12: Preparation of an erbium series working standard solution by using an erbium standard solution and the aluminum-based solution prepared in step S11, and / or preparation of a tellurium series working standard solution by using a tellurium standard solution and the aluminum-based solution prepared in step S11, or preparation of an erbium-tellurium series working standard solution by using an erbium-tellurium mixed standard solution and the aluminum-based solution prepared in step S11;

[0074] In step S1, the following steps are included:

[0075] Step S121: 1 mg / mL of the erbium standard solution is diluted into 0.100 mg / mL and 0.01 mg / mL of the erbium standard solution, respectively;

[0076] Step S122: Five aluminum-based solutions are prepared according to the method of step S11, and the five aluminum-based solutions are placed in five 100 mL volumetric flasks, respectively;

[0077] Step S123: Pure water is added to the first volumetric flask to reach the 100 mL scale to form a blank solution;

[0078] Step S124: 1 mL of the erbium standard solution with a concentration of 0.01 mg / mL is added to the second volumetric flask, and then pure water is added to reach the 100 mL scale to form an erbium standard solution A, and the concentration of erbium in the erbium standard solution A is 0.10 μg / mL;

[0079] Step S125: 10 mL of the erbium standard solution with a concentration of 0.01 mg / mL is added to the third volumetric flask, and then pure water is added to reach the 100 mL scale to form an erbium standard solution B, and the concentration of erbium in the erbium standard solution B is 1.0 μg / mL;

[0080] Step S126: 5 mL of the 0.1 mg / mL erbium standard solution is added to a fourth volumetric flask, and then pure water is added to make up to 100 mL to form an erbium standard solution C, and the concentration of erbium in the erbium standard solution C is 5.0 μg / mL;

[0081] Step S127: 10 mL of the 0.1 mg / mL erbium standard solution is added to a fifth volumetric flask, and then pure water is added to make up to 100 mL to form an erbium standard solution D, and the concentration of erbium in the erbium standard solution D is 10.0 μg / mL;

[0082] The preparation method of the tellurium series working standard solution is as follows:

[0083] Step S121': 1 mg / mL of the tellurium standard solution is diluted into 0.100 mg / mL and 0.01 mg / mL of the tellurium standard solution, respectively;

[0084] Step S122': 5 aluminum-based solutions are prepared according to the method of step S11, and the 5 aluminum-based solutions are placed in 5 100 mL volumetric flasks, respectively;

[0085] Step S123': pure water is added to the first volumetric flask to the 100 mL scale to form a blank solution;

[0086] Step S124': 1 mL of the 0.01 mg / mL tellurium standard solution is added to the second volumetric flask, and then pure water is added to make up to 100 mL to form a tellurium standard solution A, and the concentration of tellurium in the tellurium standard solution A is 0.10 μg / mL;

[0087] Step S125': 10 mL of the 0.01 mg / mL tellurium standard solution is added to the third volumetric flask, and then pure water is added to make up to 100 mL to form a tellurium standard solution B, and the concentration of tellurium in the tellurium standard solution B is 1.0 μg / mL;

[0088] Step S126': 5 mL of the 0.1 mg / mL tellurium standard solution is added to the fourth volumetric flask, and then pure water is added to make up to 100 mL to form a tellurium standard solution C, and the concentration of tellurium in the tellurium standard solution C is 5.0 μg / mL;

[0089] Step S127': 10 mL of the 0.1 mg / mL tellurium standard solution is added to the fifth volumetric flask, and then pure water is added to make up to 100 mL to form a tellurium standard solution D, and the concentration of tellurium in the tellurium standard solution D is 10.0 μg / mL;

[0090] The preparation method of the erbium tellurium series working standard solution is as follows:

[0091] Step S121": dilute the 1 mg / mL erbium standard solution and the 1 mg / mL tellurium standard solution to 0.100 mg / mL and 0.01 mg / mL respectively to prepare an erbium-tellurium mixed standard solution;

[0092] Step S122": prepare 5 aluminum-based solutions according to the method of Step S11, and place the 5 aluminum-based solutions in 5 100 mL volumetric flasks respectively;

[0093] Step S123": add pure water to the first volumetric flask to the 100 mL mark to form a blank solution;

[0094] Step S124": add 1 mL of the 0.01 mg / mL erbium-tellurium mixed standard solution to the second volumetric flask, and then add pure water to the 100 mL mark to form an erbium-tellurium mixed standard solution A, the concentration of erbium-tellurium in the erbium-tellurium mixed standard solution A being 0.10 μg / mL;

[0095] Step S125": add 10 mL of the 0.01 mg / mL erbium-tellurium mixed standard solution to the third volumetric flask, and then add pure water to the 100 mL mark to form an erbium-tellurium mixed standard solution B, the concentration of erbium-tellurium in the erbium-tellurium mixed standard solution B being 1.0 μg / mL;

[0096] Step S126": add 5 mL of the 0.1 mg / mL erbium-tellurium mixed standard solution to the fourth volumetric flask, and then add pure water to the 100 mL mark to form an erbium-tellurium mixed standard solution C, the concentration of erbium-tellurium in the erbium-tellurium mixed standard solution C being 5.0 μg / mL;

[0097] Step S127": add 10 mL of the 0.1 mg / mL erbium-tellurium mixed standard solution to the fifth volumetric flask, and then add pure water to the 100 mL mark to form an erbium-tellurium mixed standard solution D, the concentration of erbium-tellurium in the erbium-tellurium mixed standard solution D being 10.0 μg / mL.

[0098] The erbium standard solutions A to D, the tellurium standard solutions A to D, and the erbium-tellurium mixed standard solutions A to D prepared by the above steps are respectively combined with the blank solution to form a series of working standard solutions, which are used for the determination of the percentage content of erbium and / or tellurium in aluminum alloys.

[0099] In the research process, in order to determine whether the aluminum-based material has an influence on the test results, corresponding tests are carried out, the power is set to 1.2 kW, the atomizer flow is set to 0.7 L / min, and the plasma gas flow is set to 12.0 L / min, the spectral intensities of the erbium-tellurium standard solutions containing 0%, 0.01%, 0.1%, and 0.5% erbium-tellurium without an aluminum matrix and the erbium-tellurium standard solution containing 1 mg / mL aluminum matrix are respectively determined, and the test intensities are shown in Table 1:

[0100] Table 1 Test spectrum intensity comparison

[0101]

[0102] From Table 1, the presence of aluminum matrix makes the intensity of erbium in the standard solution slightly decrease, and the background value of the blank solution enhances, the intensity increases. In order to make the test result accurate, when testing the content of erbium in aluminum alloy, the matrix matching must be used. Similarly, in order to ensure the accuracy of the test of tellurium content in aluminum alloy, the aluminum matrix must be prepared when preparing the tellurium standard solution. When testing the content of erbium and tellurium in aluminum alloy, the matrix matching must be used. Therefore, in the prepared series of working curves using erbium and / or tellurium standard solution, a certain amount of aluminum is required.

[0103] Because whether the working parameters are reasonable is the key factor related to whether the test can be measured and the test result is accurate or not, therefore, during the research and development process, the selection of working parameters is optimized. Through inductively coupled plasma atomic emission spectrometer, the series of working standard solutions and the aluminum alloy to be tested are scanned and determined, combined with the spectrum situation, the peak intensity, the interference situation and the test comparison situation of the series of working standard solutions containing erbium and tellurium, the working parameters are determined.

[0104] The observation mode, observation height, atomizer flow, power, plasma gas flow and the like are important condition parameters related to the strength of the spectral line, whether the method working curve is in linear relationship or not, therefore, according to the test situation and practical experience data, the number of repeated determination is set to 2-3 times, the pump speed is 12 rpm, the lifting delay is 10 s, the reading time is 5-6 s, the auxiliary gas flow is 1.00 L / min, 12.0 L / min, under this condition, the selection test research of the observation mode, observation height, atomizer flow, power, plasma gas flow and the like is carried out. After the observation mode is determined, one of the atomizer flow, power, plasma gas flow and the like is changed to carry out orthogonal test, so as to select the best working parameter. The specific is as follows:

[0105] 1. Selection of observation height

[0106] Under the radial observation, the atomizer flow is set to 0.70 L / min, the power is 1.20 kW, the selection of observation height is tested for the 5 μg / mL erbium tellurium standard solution containing aluminum matrix (see Table 2), the selection of observation height is tested for the 1 μg / mL erbium tellurium standard solution containing aluminum matrix (see Table 3), the data is as follows:

[0107] Table 2 Test data of 5 μg / mL erbium tellurium standard solution containing aluminum matrix at different observation heights

[0108]

[0109] From the test data in Table 2, it can be seen that the spectral intensities of Er369.265, Te214.282 and Te238.579 gradually decrease as the observation height increases from 5 mm to 10 mm.

[0110] Table 3 Test data of 1 μg / mL erbium telluride standard solution with aluminum base at different observation heights

[0111]

[0112] Note: X represents signal, B represents background, and X / B represents signal-to-background ratio.

[0113] From Table 3, it can be seen that the spectral intensities of the lines increase as the observation height increases from 5 mm to 9 mm, and the trend of the intensities of some lines is parabolic. According to the background and the test data in Table 2, the observation height is set to be 5-8 mm in radial observation.

[0114] 2. Selection of observation mode

[0115] The flow rate of the atomizer is set to be 0.70 L / min, and the power is set to be 1.20 kW. The 5 μg / mL erbium telluride standard solution with aluminum base is tested to select the observation mode.

[0116] Table 4 Spectral intensities at different observation modes

[0117]

[0118] From Table 4, it can be seen that the spectral intensity of SVDV observation mode is higher than that of axial observation and radial observation for Er369.265 and Te238.579, but the spectral intensity of axial observation is higher than that of SVDV observation and radial observation for Te214.282. Since the intensity of Te214.282 is low, the precision and detection limit data of the sample at different observation modes (see Table 5) are analyzed and selected.

[0119] Table 5 Precision and detection limit data at different observation modes

[0120]

[0121]

[0122] From Table 5, it can be seen that the detection limits at different observation modes are not greater than 0.010%, which can meet the requirements. However, the precision of the sample tested at the axial observation mode is better than that at the radial observation mode, and the detection limit is not greater than 0.0010%. In addition, the spectral intensity of tellurium at the radial observation mode is low. Therefore, the axial observation mode is better for detection in terms of the precision data.

[0123] 3. Selection of nebulizer flow and power

[0124] Under the axial observation, the plasma gas flow was set at 12.0 L / min, the power and the nebulizer flow were changed respectively, the standard solution of 5 μg / mL erbium tellurium containing aluminum base was tested, and the selection of nebulizer flow and power was carried out; the test data are shown in Table 6.

[0125] Table 6 Selection of nebulizer flow and power

[0126]

[0127]

[0128] From Table 6, it can be seen that the nebulizer flow is between 0.70 L / min and 0.85 L / min, under the same nebulizer flow, with the increase of power, the spectral intensity of Er349.910, Er369.265, Te214.282 and Te238.579 gradually increases, the background value also gradually increases, and the signal-to-background ratio decreases. Although increasing the power can increase the spectral intensity and improve the method sensitivity, it also increases the background intensity and the interference. At the same time, since high power also requires high plasma gas flow, therefore, under the condition of meeting the requirements, high power should not be selected.

[0129] Under the same power, with the increase of nebulizer flow between 0.70 L / min and 0.85 L / min, under different powers, the intensity of different spectral lines has different rules. But the signal-to-background ratio of Er349.910, Er369.265, Te214.282 and Te238.579 gradually increases. According to the selection of signal-to-background ratio, the power of 1 kW, the nebulizer flow of 0.85 L / min and the plasma gas flow of 12.0 L / min are better, but since the intensity of tellurium is low when the nebulizer flow is 0.85 L / min, under this condition, the 20009236-2# aluminum alloy sample is measured for 10 times, and the measured values are respectively: 0.1718; 0.1549; 0.1566; 0.1543; 0.1489; 0.1540; 0.1545; 0.1508; 0.1546; 0.1514. The average value is: 0.151%, and the RSD value is: 4.04%. The RSD value is relatively high. Therefore, considering the spectral intensity, the detection limit and other factors, the nebulizer flow of 0.70 L / min to 0.80 L / min and the power of 1.00 kW to 1.30 kW are selected.

[0130] 4. Selection of plasma gas flow

[0131] Under the axial observation, the power 1.20 kW was set, the plasma gas flow and the atomizer flow were changed respectively, the standard solution of 5 μg / mL erbium tellurium containing aluminum base was tested to select the plasma gas flow. Part of the orthogonal test data is shown in Table 7.

[0132] Table 7 Selection of plasma gas flow

[0133]

[0134]

[0135] With the gradual increase of the plasma gas flow between 11.5 L / min and 13.5 L / min, the intensity of Er369.265 increases with the increase of the plasma gas flow, but the increase is small. The intensity of Er369.265 at the plasma gas flow of 12.0 L / min is slightly higher than that at 11.5 L / min.

[0136] In combination, the atomizer flow of 0.70 L / min to 0.80 L / min, the power of 1.00 kW to 1.30 kW, and the plasma gas flow of 12 L / min to 13 L / min are selected.

[0137] According to the experimental research, the working parameter selection for determining the content of erbium and tellurium in aluminum alloy by ICP-AES method is:

[0138] Power: 1.00 kW to 1.30 kW;

[0139] Plasma gas flow: 12 L / min to 13 L / min;

[0140] Auxiliary gas flow: 1.0 L / min to 1.1 L / min;

[0141] Atomizer gas flow: 0.70 L / min to 0.80 L / min;

[0142] Pump speed: 12 rpm to 13 rpm;

[0143] Stable delay time: 13 s to 15 s;

[0144] Sample lifting time: 9 s to 12 s;

[0145] Reading time: 5 s to 6 s;

[0146] Number of repeated measurements: 2 to 3 times;

[0147] Observation height: 5 to 8 mm.

[0148] In step S3, the series of working standard solutions prepared in step S1 and the aluminum alloy to-be-measured solution prepared in step S2 are scanned and determined by an inductively coupled plasma atomic emission spectrometer, and the analysis spectral lines of erbium and tellurium are selected according to the atlas, the degree of interference, whether the interference peaks can be distinguished, the signal-to-background ratio, and the test comparison of the series of working standard solutions containing erbium and / or tellurium;

[0149] A plurality of spectral lines of erbium and tellurium elements are preselected from the element spectral line table, and the blank solution, standard solution A, standard solution B, standard solution C, standard solution D and the to-be-measured solution of the aluminum alloy containing erbium and / or tellurium are scanned respectively, and the interference of each spectral line of erbium in the determination of the content of erbium in the aluminum alloy by the ICP-AES method is obtained as follows:

[0150] The interference lines of the analysis spectral line Er323.058nm are: Mn323.071nm, Mn323.023nm;

[0151] The interference lines of the analysis spectral line Er326.478nm are: Mn326.471nm, Zr326.481nm, Tb328.490nm;

[0152] The interference lines of the analysis spectral line Er349.910nm are: Zr349.956nm, U349.932nm, Th349.491nm, Ru349.894nm;

[0153] The interference lines of the analysis spectral line Er369.265nm are: Mo369.264nm, Rh369.236nm, Sm369.278nm;

[0154] The interference lines of the analysis spectral line Er390.631nm are: Co390.629nm, Nd390.587nm, Fe390.648nm;

[0155] The interference of each spectral line of tellurium in the determination of the content of tellurium in the aluminum alloy by the ICP-AES method is obtained as follows:

[0156] The interference lines of the analysis spectral line Te182.153nm are: Pb182.143nm, Si182.183nm, Fe182.157nm;

[0157] The interference lines of the analysis spectral line Te200.203nm are: Co200.233nm, Cr200.299nm, As200.334nm;

[0158] The interference lines of the analysis spectral line Te208.117nm are: Mo208.170nm, Mo208.047nm, Ni208.085nm;

[0159] Interference lines of Te 214.282 nm analytical spectral line are: V 214.275 nm, Re 214.297 nm;

[0160] Interference lines of Te 214.726 nm analytical spectral line are: Nb 214.719 nm, Ta 214.688 nm, V 214.754 nm;

[0161] Interference lines of Te 225.903 nm analytical spectral line are: Os 225.898 nm, Ir 225.886 nm, Ta 225.872 nm, Ga 225.922 nm;

[0162] Interference lines of Te 238.328 nm analytical spectral line are: Fe 238.325 nm, Fe 238.306 nm, W 238.299 nm, Rh 238.340 nm, Ru 238.344 nm, Co 238.345 nm;

[0163] Interference lines of Te 238.579 nm analytical spectral line are: Os 238.604 nm, Rh 238.614 nm;

[0164] In combination with spectral atlas, interference degree, whether the interference peaks can be distinguished, signal-to-background ratio, and test comparison of series of working standard solutions containing erbium and / or tellurium, finally selected:

[0165] Er 349.910 nm and Er 369.265 nm are analytical spectral lines for determination of erbium content in aluminum alloy; Te 214.282 nm and Te 238.579 nm are analytical spectral lines for determination of tellurium content in aluminum alloy.

[0166] Regarding the spectral interference in the determination of erbium and tellurium, since there is less chemical interference in the analysis of erbium and tellurium in aluminum alloy, the main interference is physical interference and spectral interference. The physical interference in the determination of erbium and tellurium is eliminated by matrix matching method. The spectral interference in the determination of erbium and tellurium is first eliminated by selecting appropriate analytical lines and appropriate background deduction points according to the spectral interference in the selection of analytical spectral lines. The background deduction points for Er 349.910 nm are 349.888 nm and 349.923 nm; the background deduction points for Er 369.265 nm are 369.245 nm and 369.283 nm; the background deduction points for Te 214.282 nm are 214.272 nm and 214.292 nm; the background deduction points for Te 238.579 nm are 238.568 nm and 238.589 nm.

[0167] In step S4, the selected erbium and / or tellurium analysis spectral line intensity value and its concentration value establish a corresponding working curve and obtain a method linear equation, then the aluminum alloy to be measured is determined and the emission spectral line intensity of erbium and / or tellurium is obtained, and the inductively coupled plasma atomic emission spectrometer automatically calculates the percentage content of erbium and / or tellurium in the aluminum alloy according to the working curve;

[0168] Wherein, under the conditions of power 1.2kW, atomizer flow 0.70L / min, and plasma gas flow 12.5L / min, the working curve linear equation of erbium Er349.910 is y=4.87×10 4 x+77.92, the correlation coefficient r=0.9999; the working curve linear equation of erbium Er369.265 is y=3.81×10 4 x+158.44, the correlation coefficient r=0.9999; the working curve linear equation of tellurium Te214.282 is y=1.12×10 3 x+53.97, the correlation coefficient r=0.9993. The working curve linear equation of tellurium Te238.579 is y=3.76×10 2 x+5.92, the correlation coefficient r=0.9994. It can be seen that the correlation coefficient r of the above working curve linear equation is all ≥0.999, which meets the requirement that the general method correlation coefficient is not less than 0.995.

[0169] According to the measured emission spectral line intensity of erbium and / or tellurium elements in the aluminum alloy to be measured, the inductively coupled plasma atomic emission spectrometer can automatically calculate the percentage content of erbium and / or tellurium in the aluminum alloy according to the working curve.

[0170] The above process provides basic conditions and basic working parameters for determining the content of erbium and tellurium in aluminum alloy. Once the method for determining the content of erbium and tellurium in aluminum alloy is established in the inductively coupled plasma atomic emission spectrometer, after the instrument is turned on and stabilized for 5 minutes, the established method for determining the content of erbium and tellurium in aluminum alloy can be selected, only the file name of the test storage needs to be named, and then the working curve of the concentration of erbium and tellurium to the spectral intensity can be obtained by using the erbium standard solution or the tellurium standard solution or the mixed standard solution of erbium and tellurium, and then the spectral intensity of the aluminum alloy to be measured is determined, and the percentage content of erbium and tellurium in the aluminum alloy is automatically calculated by the inductively coupled plasma atomic emission spectrometer according to the working curve linear equation, so that the determination time is saved, and the whole on-machine analysis test time can be completed within 1h. If the preparation of the series of working standard solutions and all other times are added, the analysis and determination of the percentage content of erbium and tellurium in an aluminum alloy sample can be completed within 8 hours, which can meet the needs of scientific research and production.

[0171] In step S4, in addition to the establishment of the method linear method equation, the detection calculation of the correlation coefficient, the relative standard deviation (RSD), and the detection limit is included, wherein the detection calculation of the relative standard deviation (RSD) includes:

[0172] The spectral intensity of the erbium standard solution is used to draw a working curve of the erbium concentration, and the 20029477# aluminum alloy sample is determined 11 times, and the determination values (%) are 0.2522, 0.25026, 0.25175, 0.25315, 0.25139, 0.25115, 0.25298, 0.25127, 0.2519, 0.24974, and 0.25302. The average value is 0.252%, and the relative standard deviation (RSD) value is 0.44%. The RSD value is not greater than 1.00%, and the method precision can meet the test requirements of the analysis and detection.

[0173] The spectral intensity of the tellurium standard solution is used to draw a working curve of the tellurium concentration, and the 20009236-2# aluminum alloy sample is determined 11 times, and the determination values (%) are 0.157, 0.158, 0.158, 0.158, 0.159, 0.160, 0.157, 0.158, 0.159, 0.158, and 0.159. The average value is 0.158%, and the RSD value is 0.59%. The RSD value is not greater than 1.00%, and the method precision can meet the test requirements of the analysis and detection.

[0174] It can be seen that the relative standard deviations of the erbium and / or tellurium contents in the aluminum alloy detected by the determination method provided in the embodiment are all less than 1%, which meets the relevant requirements.

[0175] The detection calculation of the detection limit includes:

[0176] Under the determined working conditions, the working curve is established, the reagent blank solution is determined 10 times in succession, the standard deviation of the 10 times of determination is multiplied by 3 to obtain the detection limit, and the detection limit (%) is: erbium: 6.05 x 10 -8 ; tellurium: 1.18 x 10 -5 Through multiple tests, the method detection limits of erbium and tellurium are both not greater than 0.0010%.

[0177] In order to study the accuracy of the above determination method, a recovery rate test is performed for verification, including:

[0178] Test procedure: aluminum alloy samples 2106030454-2, 20009236-2 were each weighed 4 times 0.1 g (see table below for specific values) into 100 mL dual-purpose bottles, 5 mL of hydrochloric acid was added to dissolve, then 1 mL of nitric acid was added, after the solution was clear, it was taken out, 100 μg / mL of erbium, tellurium standard solution 0 mL, 1.00 mL, 2.00 mL, 5.00 mL (equivalent to adding 0 mg, 0.100 mg, 0.200 mg, 0.500 mg) was added, respectively, and then diluted to 100 mL. Except for the observation method, different atomizer flow, power 1.2 Kw, plasma gas flow 12.0 L / min, etc. The parameters determined in this example were used. The erbium and tellurium contents in the eight sample solutions were tested under the axial observation method and different atomizer flow, as shown in Table 8. The erbium and tellurium contents in the eight sample solutions were tested under the radial observation method (observation height 5 mm) and different atomizer flow, as shown in Table 9. The erbium and tellurium contents in the eight sample solutions were tested under the radial observation method (observation height, 8 mm) and different atomizer flow, as shown in Table 10.

[0179] Table 8 Recovery rate test data under axial observation method and different atomizer flow

[0180]

[0181]

[0182] Table 9 Recovery rate test data under radial observation method (observation height 5 mm) and different atomizer flow

[0183]

[0184]

[0185] Table 10 Recovery rate test data under radial observation method (observation height 8 mm) and different atomizer flow

[0186]

[0187]

[0188] From Tables 8-10, it can be seen that, in the axial observation mode, the recovery rate is better under the condition of an atomizer flow rate of 0.70 L / min or an atomizer flow rate of 0.75 L / min, and basically meets the requirements. In the radial observation mode (observation height of 5 mm) and an atomizer flow rate of 0.75 L / min, and in the radial observation mode (observation height of 8 mm) and an atomizer flow rate of 0.70 L / min, the recovery rate of the 20009236-2 sample with 0.1 mg of erbium and tellurium added is higher, and therefore, the test conditions can be appropriately adjusted according to the difference in the content of erbium and tellurium in the sample. In combination with the precision and detection limit data under different conditions (Table 5), the optimal test conditions of the determination method in this embodiment are determined to be: axial observation, an atomizer flow rate of 0.70 L / min to 0.80 L / min, a power of 1.00 kW to 1.30 kW, and a plasma gas flow rate of 12 L / min to 13 L / min.

[0189] It can be seen from the above recovery rate test that, under the condition of axial observation, the recovery rate of erbium and / or tellurium in the aluminum alloy is between 95% and 120% by the determination method provided in this embodiment, indicating that the determination method provided in this embodiment is accurate and reliable.

[0190] It should be noted that, for the same quality of aluminum alloy, the percentage content of erbium and / or tellurium in the aluminum alloy calculated by the inductively coupled plasma atomic emission spectrometer is unique regardless of the value weighed in the range of 0.0900 g to 0.1400 g, such as two aluminum alloy test solutions prepared by weighing 0.10 g and 0.13 g of the same aluminum alloy, the percentage content of erbium and / or tellurium in the aluminum alloy determined from the two aluminum alloy test solutions is the same, for example, in one of the embodiments, the inductively coupled plasma atomic emission spectrometer is used to test the test solutions prepared by weighing 0.10 g and 0.13 g of the aluminum alloy, respectively, and the test results show that the erbium content is 0.243%, and the tellurium content is 0.010%. In another embodiment, another quality of aluminum alloy is tested, and the inductively coupled plasma atomic emission spectrometer is used to test the test solutions prepared by weighing 0.090 g and 0.1202 g of the aluminum alloy, respectively, and the test results show that the erbium content is 0.024%, and the tellurium content is 0.190%.

[0191] It should be noted that all the terms indicating the direction and position in the present application, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "top", "low", "tail end", "head end", "center", etc. are only used to explain the relative position relationship, connection condition, etc. between the components in a certain state, and are only for the convenience of describing the present application, and thus cannot be understood as the limitation on the present application which must be constructed and operated in a particular orientation. In addition, the description involving "first", "second", etc. in the present application is only for the description purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features.

[0192] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the present application, can make various changes and modifications, and thus the protection scope of the present application should be limited by the scope defined in the claims.

Claims

1. A method for determining the percentage content of erbium and tellurium in aluminum alloys using ICP-AES, characterized in that, Includes the following steps: Step S1: Prepare one or more of the following: erbium standard solution, tellurium standard solution, and erbium-tellurium mixed standard solution; prepare an aluminum-based solution; then use the erbium and / or tellurium standard solution and the aluminum-based solution to prepare a series of working standard solutions. Use the erbium standard solution to prepare a series of erbium working standard solutions with an erbium element concentration range of 0–10.0 μg / mL; use the tellurium standard solution to prepare a series of tellurium working standard solutions with a tellurium element concentration range of 0–10.0 μg / mL; use the erbium-tellurium mixed standard solution to prepare a series of erbium-tellurium working standard solutions with both erbium and tellurium element concentration ranges of 0–10.0 μg / mL. Step S2: Weigh 0.0900-0.1400g of aluminum alloy sample, place it in a 100mL two-purpose bottle, add 5mL of hydrochloric acid to dissolve it, then add 1mL of nitric acid, heat to dissolve, and after the sample is completely dissolved and the solution is clear, remove it, cool it to room temperature, dilute it with water to the mark, shake well, and obtain the aluminum alloy test solution. Step S3: The one or more series of working standard solutions prepared in Step S1 and the aluminum alloy test solution prepared in Step S2 are scanned and measured using an inductively coupled plasma atomic emission spectrometer. The analytical spectral lines for erbium and tellurium are selected based on the spectral characteristics, interference level, whether the interference peaks can be distinguished, the signal-to-background ratio, and the comparison with the test results of a series of working standard solutions containing erbium and / or tellurium. The analysis of erbium and tellurium in aluminum alloys mainly involves physical and spectral interference. Physical interference in the analysis of erbium and tellurium is eliminated using matrix matching, while spectral interference is eliminated using background subtraction. The analytical spectral lines for erbium and tellurium selected in Step S3 are: Erbium: 349.910 nm. 369.265nm; Tellurium: 214.282nm; 238.579nm; Step S4: Based on the intensity values ​​and concentration values ​​of the erbium and tellurium analytical spectral lines selected in Step S3, establish corresponding working curves and obtain the linear equation of the method. Then, measure the emission spectral intensity of erbium and / or tellurium in the aluminum alloy test solution and obtain its emission spectral intensity. The inductively coupled plasma atomic emission spectrometer automatically calculates the percentage content of erbium and / or tellurium in the aluminum alloy based on the working curve. In Step S4, under the conditions of power 1.2kW, nebulizer flow rate 0.70L / min, and plasma gas flow rate 12.5L / min, the linear equation of the working curve for erbium Er349.910 is: y=4.87×10 4 x + 77.92, correlation coefficient r = 0.9999; the linear equation of the working curve for Er369.265 is: y = 3.81 × 10 4 x+158.44, correlation coefficient r=0.9999; The linear equation for the working curve of tellurium Te214.282 is: y = 1.12 × 10⁻⁶ 3 x+53.97, correlation coefficient r=0.9993; the linear equation of the working curve of Te238.579 tellurium is: y=3.76×10 2 x+5.92, correlation coefficient r=0.9994.

2. The method for determining the percentage content of erbium and tellurium in aluminum alloys using ICP-AES as described in claim 1, characterized in that, The series of working standard solutions includes a blank solution and several working standard solutions. The blank solution does not contain erbium and tellurium, while the working standard solutions contain erbium and / or tellurium.

3. The method for determining the percentage content of erbium and tellurium in aluminum alloys using ICP-AES as described in claim 2, characterized in that, Step S1 includes: Step S11: Preparation method of aluminum-based solution: Weigh 0.100g of high-purity aluminum, dissolve it in 5mL hydrochloric acid and 1mL nitric acid, and transfer it to a 100mL volumetric flask to obtain aluminum-based solution; Step S12: Prepare a series of erbium working standard solutions using the erbium standard solution and the aluminum-based solution prepared in step S11, and / or prepare a series of tellurium working standard solutions using the tellurium standard solution and the aluminum-based solution prepared in step S11; or, prepare a series of erbium-tellurium working standard solutions using a mixed erbium-tellurium standard solution and the aluminum-based solution prepared in step S11. The preparation method of the erbium series working standard solutions is as follows: Step S121: Dilute the 1 mg / mL erbium standard solution to 0.100 mg / mL and 0.01 mg / mL erbium standard solutions, respectively; Step S122: Prepare 5 portions of aluminum-based solution according to the method in step S11, and place the 5 portions of aluminum-based solution into 5 volumetric flasks of 100 mL each; Step S123: Add pure water to the first volumetric flask to the 100 mL mark to form a blank solution; Step S124: Add 1 mL of 0.01 mg / mL erbium standard solution to the second volumetric flask, and then add pure water to make up to 100 mL to form erbium standard solution A, in which the concentration of erbium is 0.10 μg / mL; Step S125: Add 10 mL of erbium standard solution with a concentration of 0.01 mg / mL to the third volumetric flask, and then add pure water to make up to 100 mL to form erbium standard solution B, in which the concentration of erbium is 1.0 μg / mL; Step S126: Add 5 mL of 0.1 mg / mL erbium standard solution to the fourth volumetric flask, and then add pure water to make up to 100 mL to form erbium standard solution C, in which the concentration of erbium is 5.0 μg / mL; Step S127: Add 10 mL of 0.1 mg / mL erbium standard solution to the fifth volumetric flask, and then add pure water to make up to 100 mL to form erbium standard solution D, in which the concentration of erbium is 10.0 μg / mL; The preparation method of tellurium series working standard solutions is as follows: Step S121': Dilute the 1 mg / mL tellurium standard solution to 0.100 mg / mL and 0.01 mg / mL tellurium standard solutions, respectively; Step S122': Prepare 5 portions of aluminum-based solution according to the method in step S11, and place the 5 portions of aluminum-based solution into 5 volumetric flasks of 100 mL each; Step S123': Add pure water to the first volumetric flask to the 100 mL mark to form a blank solution; Step S124': Add 1 mL of 0.01 mg / mL tellurium standard solution to the second volumetric flask, and then add pure water to make up to 100 mL to form tellurium standard solution A, in which the concentration of tellurium is 0.10 μg / mL; Step S125': Add 10 mL of 0.01 mg / mL tellurium standard solution to the third volumetric flask, and then add pure water to make up to 100 mL to form tellurium standard solution B, in which the concentration of tellurium is 1.0 μg / mL. Step S126': Add 5 mL of 0.1 mg / mL tellurium standard solution to the fourth volumetric flask, and then add pure water to make up to 100 mL to form tellurium standard solution C, in which the concentration of tellurium is 5.0 μg / mL; Step S127': Add 10 mL of 0.1 mg / mL tellurium standard solution to the fifth volumetric flask, and then add pure water to make up to 100 mL to form tellurium standard solution D, in which the concentration of tellurium is 10.0 μg / mL; The preparation method of the erbium tellurium series working standard solutions is as follows: Step S121": Dilute the 1 mg / mL erbium standard solution and the 1 mg / mL tellurium standard solution to prepare mixed erbium-tellurium standard solutions of 0.100 mg / mL and 0.01 mg / mL, respectively; Step S122": Prepare 5 portions of aluminum-based solution according to the method in step S11, and place the 5 portions of aluminum-based solution into 5 volumetric flasks of 100 mL each; Step S123": Add pure water to the first volumetric flask to the 100 mL mark to form a blank solution; Step S124": Add 1 mL of erbium tellurium mixed standard solution with a concentration of 0.01 mg / mL to the second volumetric flask, and then add pure water to make up to 100 mL to form erbium tellurium mixed standard solution A, in which the concentration of erbium tellurium in erbium tellurium mixed standard solution A is 0.10 μg / mL; Step S125": Add 10 mL of erbium tellurium mixed standard solution with a concentration of 0.01 mg / mL to the third volumetric flask, and then add pure water to make up to 100 mL to form erbium tellurium mixed standard solution B, in which the concentration of erbium tellurium in erbium tellurium mixed standard solution B is 1.0 μg / mL; Step S126": Add 5 mL of erbium tellurium mixed standard solution with a concentration of 0.1 mg / mL to the fourth volumetric flask, and then add pure water to make up to 100 mL to form erbium tellurium mixed standard solution C. The concentration of erbium tellurium in erbium tellurium mixed standard solution C is 5.0 μg / mL. Step S127": Add 10 mL of erbium-tellurium mixed standard solution with a concentration of 0.1 mg / mL to the fifth volumetric flask, and then add pure water to make up to 100 mL to form erbium-tellurium mixed standard solution D, in which the concentration of erbium-tellurium in erbium-tellurium mixed standard solution D is 10.0 μg / mL.

4. The method for determining the percentage content of erbium and tellurium in aluminum alloys using ICP-AES as described in claim 3, characterized in that, In step S3, the operating parameters of the inductively coupled plasma atomic emission spectrometer are as follows: Power: 1.00kW~1.30kW; Plasma gas flow rate: 12 L / min ~ 13 L / min; Auxiliary gas flow rate: 1.0L / min~1.1L / min; Atomizing gas flow rate: 0.70 L / min~0.80 L / min; Pump speed: 12 rpm to 13 rpm; Stable latency: 13s~15s; Sample lifting time: 9s~12s; Reading time: 5s~6s; Number of repeated measurements: 2 to 3 times; Observation height: 5-8 mm.

5. The method for determining the percentage content of erbium and tellurium in aluminum alloys using ICP-AES as described in claim 1, characterized in that, In step S4, in addition to establishing the linear equation of the method, the detection calculations of relative standard deviation (RSD) and detection limit are also included.

6. The method for determining the percentage content of erbium and tellurium in aluminum alloys using ICP-AES as described in claim 5, characterized in that, The testing range for erbium tellurium is 0.010–1.00%, with a relative standard deviation of ≤1% and a detection limit of ≤0.0010%.

7. The method for determining the percentage content of erbium and tellurium in aluminum alloys using ICP-AES as described in any one of claims 1-5, characterized in that, The hydrochloric acid used has a mass concentration of 36.0–38.0%, and the nitric acid has a mass concentration of 69.0–71.0%.

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