Reagent combination, analyzer and detection method for detecting beryllium element content in water sample

Abstract

The invention discloses a reagent combination, an analyzer and a detection method for detecting beryllium element content in a water sample. The reagent combination is composed of a color developing agent, a masking agent, a buffer solution and a catalytic solution. The color developing agent comprises chrome cyanine R; the masking agent comprises EDTA (Ethylene Diamine Tetraacetic Acid), ascorbic acid, tartaric acid and ethylene glycol amine; the buffer solution comprises ammonium acetate and hydrochloric acid; the catalytic liquid comprises hexadecylpyridinium chloride. Compared with a standard method, the adopted reagents have the advantages that the reaction steps are simplified, the stability of the reagents is better, the shelf life is longer, the reagents such as ammonia water and hexamethylenetetramine used in the standard method not only have pungent smell and larger environmental pollution, but also are easy to volatilize and deteriorate, and are not beneficial to long-term storage, so that the long-term measurement result is deviated, and the accuracy of the detection result is improved. Reagents used in the method do not have the defects, and can be stored for a long time at normal temperature, so that the method can be suitable for unattended automatic instruments and automatic water quality monitoring stations.

Description

Technical Field

[0001] The invention relates to the technical field of water sample analysis, and in particular to a reagent combination, an analyzer and a detection method for detecting the content of beryllium in a water sample. Background Art

[0002] Beryllium is an off-white alkaline earth metal with a hard and malleable texture. It is soluble in both acid and alkali. It is an amphoteric metal with a density of 1.85 gcm -3 , slightly heavier than magnesium, but 1 / 3 lighter than aluminum. It is a light metal and is mainly used to prepare alloys. Beryllium has very important uses in the fields of national defense, aerospace, and electronics industries, but beryllium and its compounds are highly toxic. Beryllium compounds such as beryllium oxide, beryllium fluoride, beryllium chloride, beryllium sulfide, and beryllium nitrate are highly toxic. Generally speaking, soluble beryllium is highly toxic, while insoluble beryllium is less toxic. Even a very small amount can cause local irritation and damage the skin, mucous membranes, conjunctiva, and cornea, causing inflammation, emphysema, pneumonia, etc. A trace amount can cause poisoning, and inhaling a higher amount of beryllium can cause poisoning and death. Industrial pollution of beryllium mainly comes from smelting, mining, special materials, and production wastewater of wireless equipment and instrument parts, while the beryllium content in natural water is extremely low. At present, prevention is the main approach to reducing the harm of beryllium. Accurate detection of the beryllium content in water is the first step to prevent threats.

[0003] Currently, graphite furnace atomic absorption spectrophotometry is mainly used for the detection of beryllium in water, but the matrix interference is relatively complex, the operating environment requirements are extremely high, the operation is cumbersome, and the cost of use is high. The traditional activated carbon adsorption separation-chrome Tianqing S spectrophotometry also has the problems of cumbersome operation and complex reagents.

[0004] In order to solve the above problems and meet the detection requirement of the maximum limit of beryllium in surface water centralized drinking water sources of GB 3838 Surface Water Environmental Quality Standard ≤ 2ug / L, the present invention improves the detection reagent and method of beryllium content on the basis of Determination of Beryllium in Water Quality - Chromium R Spectrophotometry (HJ / T58-2000). Summary of the invention

[0005] The present invention provides a reagent combination, an analyzer and a detection method for detecting the beryllium content in a water sample, so as to solve the technical problems that the existing beryllium detection reagents in water bodies are complex, cause great environmental pollution, are easy to volatilize and deteriorate, are not conducive to long-term storage, lead to deviations in long-term measurement results, and have cumbersome detection methods.

[0006] According to one aspect of the present invention, there is provided a reagent combination for detecting the content of beryllium in a water sample, the reagent combination comprising a color developer, a masking agent, a buffer solution and a catalytic solution;

[0007] The developer includes chrome cyanine R;

[0008] The masking agents include EDTA, ascorbic acid, tartaric acid and ethylene glycol amine;

[0009] The buffer comprises ammonium acetate and hydrochloric acid;

[0010] The catalytic liquid includes cetylpyridinium chloride.

[0011] Furthermore, the developer is obtained by dissolving chrome cyanine R with a mass concentration of 0.1%-1% in ethanol and adding water.

[0012] Furthermore, the masking agent includes EDTA with a mass concentration of 5-15%, ascorbic acid with a mass concentration of 2%-10%, tartaric acid with a mass concentration of 2%-10%, ethylene glycol amine with a volume concentration of 5-10%, and the rest is water.

[0013] Furthermore, the buffer solution includes ammonium acetate with a mass concentration of 20-30%, hydrochloric acid with a volume concentration of 2%-5%, and the rest is water.

[0014] Furthermore, the catalytic liquid includes hexadecylpyridinium chloride with a mass concentration of 1-5%, and the rest is ultrapure water.

[0015] Furthermore, the dosage ratio of the developer, masking agent, buffer solution and catalyst solution is 0.5-1:0.5-2:0.5-2:0.5-1.

[0016] According to another aspect of the present invention, there is provided an analyzer for detecting the beryllium content in a water sample, the analyzer comprising a metering module, a flow switching control module, a detection module and a data processing module, the flow switching control module being connected to a water sample to be tested, a color developer, a masking agent, a buffer solution and a catalytic liquid; the flow switching control module being connected to the metering module and the detection module respectively, and controlling the water sample to be tested, the color developer, the masking agent, the buffer solution and the catalytic liquid to enter the detection module after metering through the flow switching control module; the detection module being used for color development reaction and detection of the water sample; and the data processing module being used for processing the detection result.

[0017] Furthermore, the detection module includes a measuring chamber, an optical signal transmitting component and an optical signal receiving component, the optical signal transmitting component and the optical signal receiving component are arranged correspondingly, the optical signal transmitting component is used to send an optical signal of a preset wavelength, and the optical signal receiving component is used to receive the optical signal passing through the measuring chamber.

[0018] Furthermore, the detection module also includes a temperature control module, which includes a heating device and a cooling device. The heating device is used to make the reagents in the measurement chamber react at a constant temperature, and the cooling device is used to cool the measurement chamber.

[0019] According to another aspect of the present invention, a method for detecting the content of beryllium in a water sample is provided, comprising the following steps:

[0020] The beryllium content in the water sample is detected by using the analyzer for detecting the beryllium content in the water sample. The water sample to be tested, the buffer solution and the masking agent are respectively added into the detection module, and then the developer and the catalyst are extracted for full reaction and then spectrophotometric detection is performed to calculate the beryllium content in the water sample.

[0021] The present invention has the following beneficial effects:

[0022] 1. The reagent combination for detecting the beryllium content in a water sample of the present invention consists of a color developer, a masking agent, a buffer solution, and a catalytic solution. In the color developer, chrome cyanine R is dissolved in ethanol, which improves stability and is convenient for use in an unattended automatic analyzer. EDTA in the masking agent can compete with phosphate for metal ions in water to form a more stable complex, thereby reducing the interference of phosphate on beryllium detection; ethylene glycol amine forms stable complexes with metal ions through its multiple amino and carboxyl groups. This complexation process reduces the free concentration of metal ions in the solution, thereby reducing their interference with beryllium detection, and has a good masking effect on calcium ions and magnesium ions in water. Ascorbic acid, as a reducing agent, can be used to mask or eliminate oxidative interfering substances, such as copper ions, iron ions, etc., as well as some free radicals and other interfering substances; tartaric acid can eliminate the interference of phosphate ions; combining EDTA, ascorbic acid, tartaric acid and ethylene glycol amine will not only have no effect on the determination of beryllium, but also can well mask or eliminate the influence of other substances in water on beryllium detection. The buffer solution includes ammonium acetate and hydrochloric acid, which are added to a fixed volume of water sample through a fixed volume of buffer solution, so as to ensure that the pH of the system is stable at about 5 when the water sample reacts. This buffer solution has a long shelf life and can effectively play a regulating buffering role for water bodies with a pH between 3 and 10. The catalytic liquid generates a stable purple micellar complex with beryllium ions and chrome cyanine R. The complex has a maximum absorbance at 586nm and shows a good gradient linearity between concentration and absorbance.

[0023] 2. Compared with the standard method, the reagents used in the present invention simplify the reaction steps, have better reagent stability and longer shelf life. The reagents such as ammonia water and hexamethylenetetramine used in the standard method not only have a pungent odor and cause great environmental pollution, but are also easy to volatilize and deteriorate, which is not conducive to long-term storage, resulting in deviations in long-term measurement results. The reagents used in the present invention do not have the above-mentioned disadvantages and can be stored for a long time at room temperature, making them suitable for unattended automated instruments and automatic water quality monitoring stations.

[0024] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 The present invention is a flow chart of an analyzer for detecting the beryllium content in a water sample.

[0027] Figure 2 This is the absorption peak scan of beryllium standard solution.

[0028] Among them: 10, metering module; 11, liquid level detection component; 12, power component; 13, metering tube; 20, flow path switching control module; 30, detection module; 31, measuring chamber; 32, optical signal transmitting component; 33, optical signal receiving component. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0030] The embodiment of the first aspect of the present invention provides a reagent combination for detecting the content of beryllium in a water sample, the reagent combination consisting of a color developer, a masking agent, a buffer solution and a catalytic solution;

[0031] The developer includes chrome cyanine R;

[0032] The masking agents include EDTA, ascorbic acid, tartaric acid and ethylene glycol amine;

[0033] The buffer comprises ammonium acetate and hydrochloric acid;

[0034] The catalytic liquid includes cetylpyridinium chloride.

[0035] The reagent combination for detecting the beryllium content in a water sample of the present invention is composed of a color developer, a masking agent, a buffer solution and a catalytic solution, wherein:

[0036] The color developer has good stability and is easy to use in unattended automatic analyzers;

[0037] The masking agent can not only eliminate the interference of general metal and non-metal ions in water samples, but also reduce the influence of phosphate on the low measurement results of beryllium detection. The EDTA in the masking agent can compete with phosphate for metal ions in water to form a more stable complex, thereby reducing the interference of phosphate on beryllium detection; ethylene glycol amine forms a stable complex with metal ions through its multiple amino and carboxyl groups. This complexation process reduces the free concentration of metal ions in the solution, thereby reducing their interference with beryllium detection, and has a good masking effect on calcium ions and magnesium ions in water; ascorbic acid, as a reducing agent, can be used to mask or eliminate oxidative Interfering substances, such as copper ions, iron ions, etc., as well as some free radicals and other interfering substances; tartaric acid can eliminate the interference of phosphate ions; combining EDTA, ascorbic acid, tartaric acid and ethylene glycolamine will not only not affect the determination of beryllium, but also can well mask or eliminate the influence of other substances in the water body on the detection of beryllium; the present invention has stronger and more comprehensive anti-interference ability than the standard method. For example, when the standard method is used, when the interfering heavy metal ions in the sample exceed a certain concentration value (calcium ions, magnesium ions>0.5mg / L, cobalt ions>0.3mg / L, etc.), it will affect the test results and affect the accuracy of the beryllium detection results.

[0038] The buffer solution includes ammonium acetate and hydrochloric acid, which are added to a fixed volume of water sample through a fixed volume of buffer solution, so as to ensure that the pH of the system is stable at about 5 when the water sample reacts. The buffer solution has a long shelf life and can effectively play a regulating and buffering role for water bodies with a pH between 3 and 10. The present invention uses ammonium acetate and hydrochloric acid to replace hexamethylenetetramine and hydrochloric acid in the standard method. Before testing the water sample, it is not necessary to use hydrochloric acid or ammonia water to adjust the pH of the water sample to weak acid or neutral before testing. Instead, a buffer solution and other reaction reagents are directly added to the water sample for beryllium element detection. The reagent of the present invention is used to detect the beryllium element. For water samples with a pH between 3 and 10, the pH of the water sample can be made to be about 5 after uniform mixing by volume at a ratio of 1:5; and the buffer solution has no ammonia odor and can be stored for a long time.

[0039] Beryllium ions react chemically with the catalyst and the color developer. In a buffer medium with a pH of about 5, beryllium ions react with chrome cyanine R (C23H15O9SNa3) and cetylpyridinium chloride (CPC) to form a stable purple micellar complex. When detected at a preset wavelength, there is a good gradient linearity between the concentration and the absorbance, and the concentration of beryllium in the water sample can be detected.

[0040] Compared with the standard method, the reagents used in the present invention simplify the reaction steps, have better reagent stability and longer shelf life. The reagents such as ammonia water and hexamethylenetetramine used in the national standard method not only have pungent odors and cause great environmental pollution, but are also easy to volatilize and deteriorate, which is not conducive to long-term storage, resulting in deviations in long-term measurement results. The reagents used in the present invention do not have the above-mentioned disadvantages and can be stored for a long time at room temperature, so that they can be used in unattended automated instruments and automatic water quality monitoring stations.

[0041] The reagent for detecting the beryllium content in a water sample provided by the present invention will not affect the detection result of beryllium, the reaction system is more stable, and after experimental comparison, it is found that the color development system for beryllium detection will not be affected; and the reaction steps are simplified, and there is no need to detect and adjust the pH of the water sample before detection.

[0042] Before testing the water sample, the beryllium standard sample is first measured, and the standard curve is calibrated with the standard sample. The concentration of the water sample is obtained through the standard curve. The test conditions and test environment of the standard sample and the water sample are completely the same, which will not affect the accuracy of the result. The reagent of the present invention is used to detect the beryllium element content. After multiple experimental certifications, including water sample comparison and blind sample assessment, the results are consistent with the results determined by the ICP-MS method.

[0043] In an embodiment of the present application, the developer is chrome cyanine R with a mass concentration of 0.1%-1%, which is obtained by dissolving chrome cyanine R in ethanol and adding water. The mass concentration of chrome cyanine R is any one of 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, etc., and can also be any combination of ranges therein. The mass concentration of chrome cyanine R in the developer is lower than 0.1%, which will affect the color development effect and stability. It is higher than 1% and has no improvement on the color development sensitivity and is difficult to dissolve.

[0044] In an embodiment of the present application, the masking agent includes EDTA with a mass concentration of 5-15%, ascorbic acid with a mass concentration of 2%-10%, tartaric acid with a mass concentration of 2%-10%, ethylene glycol amine with a volume concentration of 5-10%, and the rest is water.

[0045] The mass concentration of EDTA is any one of 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, etc., or any combination of ranges thereof. When the mass concentration of EDTA is lower than 5%, the masking effect is poor; when the mass concentration of EDTA is higher than 15%, the solution is difficult to dissolve. The mass concentration of ascorbic acid is 2%-10%; the mass concentration of tartaric acid is 2%-10%, preferably 5%. Too low a mass concentration results in poor masking effect, and too high a dosage results in too high acidity, which affects the pH of the water sample.

[0046] The mass concentration of the ethylene glycol amine is any one of 5%, 6%, 7%, 8%, 9%, 10%, etc., and can also be any combination of ranges therein. When the mass concentration of the ethylene glycol amine is lower than 5%, there is a problem of poor masking effect; when the mass concentration of the ethylene glycol amine is higher than 10%, the viscosity of the masking agent is too high, which affects the extraction accuracy.

[0047] In an embodiment of the present application, the buffer solution comprises ammonium acetate with a mass concentration of 20-30%, hydrochloric acid with a volume concentration of 2%-5%, and the rest is water. The mass concentration of ammonium acetate is any one of 20%, 22%, 24%, 25%, 28%, 30%, etc., or any combination of any ranges thereof. The mass concentration of ammonium acetate lower than 20% or higher than 30% affects the pH value of the buffer system. In an embodiment of the present application, the catalytic liquid comprises hexadecylpyridinium chloride with a mass concentration of 1-5%, and the rest is water.

[0048] In an embodiment of the present application, the dosage ratio of the developer, masking agent, buffer solution and catalyst solution is 0.5-1:0.5-2:0.5-2:0.5-1.

[0049] According to an embodiment of the second aspect of the present invention, there is provided an analyzer for detecting the content of beryllium in a water sample, see Figure 1 The analyzer includes a metering module 10, a flow path switching control module 20, a detection module 30 and a data processing module. The flow path switching control module 20 is connected to the water sample to be tested, the color developer, the masking agent, the buffer solution, and the catalytic liquid; the flow path switching control module 20 is respectively connected to the metering module 10 and the detection module 30, and the water sample to be tested, the color developer, the masking agent, the buffer solution, and the catalytic liquid are controlled by the flow path switching control module 20 to enter the detection module 30 after metering; the detection module is used for color development reaction and detection of water samples; and the data processing module is used for processing the detection results.

[0050] The beryllium automatic analyzer of the present invention includes a metering module 10, a flow path switching control module 20, a detection module 30, and a data processing module. It is a set of mature general colorimetric systems, which can also be expanded to detect total phosphorus, ammonia nitrogen, iron, manganese, nickel, chromium, copper, etc. and can complete the test equipment with colorimetry. In the analyzer of the present invention, the metering module 10 includes a liquid level detection component 11, a power component 12 and a metering tube 13, wherein the power component 12 is connected to the flow path switching control module 20 by the metering tube 13, and the sample and reagent solution required for beryllium element detection are extracted by the power component 12, and the liquid level detection component 11 is measured with the metering tube 13, so as to achieve accurate quantification of sample and reagent solution. The flow path switching control module is connected to a container (such as a standard solution, a color developer, a catalytic solution, a buffer solution, a masking agent, etc.) equipped with multiple reagents, and each reagent required for the control reaction is sequentially transported to the detection module for color development reaction, and then the water sample detection is completed. The data processing module is used to read the signal value of the solution after the reaction ends, and the concentration of beryllium element in the water sample is obtained by calculation.

[0051] Further, the detection module 30 includes a measuring chamber 31, an optical signal transmitting component 32 and an optical signal receiving component 33, wherein the optical signal transmitting component 32 is arranged corresponding to the optical signal receiving component 33, wherein the optical signal transmitting component 31 is used to transmit an optical signal of a preset wavelength, and the optical signal receiving component is used to receive the optical signal passing through the measuring chamber. Optionally, the optical signal transmitting component 32 is a light source for transmitting an optical signal of a preset wavelength, and the optical signal receiving component 33 is a photosensitive element for receiving the optical signal and transmitting the optical signal to a data processing module for processing. Optionally, the light source is an LED monochromatic impedance light source, so that the beryllium water sample after color development can be detected within the optimal absorption peak range and has a maximum signal value; the photosensitive element 11 is a photoresistor composed of a photoconductor and an electrode to receive the optical signal. More preferably, the beryllium automatic analyzer also includes an automatic cleaning module, and after the water sample detection is completed, the instrument pipeline is cleaned by the automatic cleaning module.

[0052] In an embodiment of the present invention, the detection module 30 further includes a temperature control module, which includes a heating device and a cooling device, wherein the heating device is used to react the sample in the measuring chamber 31 at a constant temperature, and the cooling device is used to cool the measuring chamber 31. The cooling device is a fan, and the temperature control during the reaction process is achieved through the cooperation of the heating device and the fan.

[0053] The heating device is used to heat the measuring chamber 31 to maintain the sample solution at a preset temperature. During the entire test process, the automatic analyzer performs the entire process reaction at a constant temperature, which can not only ensure the consistency of the color development reaction conditions and improve the stability of the test results; it can also speed up the reaction speed and shorten the detection time, so that the entire test cycle is controlled within 30 minutes.

[0054] The detection limit of the beryllium automatic analyzer of the present invention can fully meet the requirements for testing beryllium in surface water in "GB3838-2002 Surface Water Environmental Quality Standard".

[0055] According to an embodiment of the third aspect of the present invention, there is provided a method for detecting the content of beryllium in a water sample, comprising the following steps:

[0056] The beryllium content in the water sample is detected by using the analyzer for detecting the beryllium content in the water sample. The water sample to be tested, the buffer solution and the masking agent are respectively added into the detection module, and then the developer and the catalyst are extracted for full reaction and then spectrophotometric detection is performed to calculate the beryllium content in the water sample.

[0057] The following experimental cases describe the contents disclosed in the present application in more detail, and these experimental cases are only used for illustrative purposes.

[0058] The following tests were performed using the beryllium automatic analyzer of the present invention, with the instruments numbered 1 and 2:

[0059] 1. Calibration of instrument standard curve

[0060] Using 0 / 5 / 10 / 20 / 50 / 100ug / L beryllium standard solution and the curve calibration function of the instrument, the beryllium automatic analyzer was calibrated for multiple range standard curves. The results are shown in Tables 1 and 2.

[0061] Table 1 Range-curve calibration (0~50ug / L)

[0062]

[0063] Table 2 Range two curve calibration (0~100ug)

[0064]

[0065] 2. Accuracy and repeatability test

[0066] The accuracy and repeatability of the beryllium automatic analyzer were tested using a 20 / 4000ug / L beryllium standard solution. The results are shown in Table 3.

[0067] Table 3 Accuracy repeatability test

[0068]

[0069] 3. Detection limit test

[0070] The detection limit and determination lower limit of the beryllium automatic analyzer were tested using pure water. The results are shown in Table 4.

[0071] Table 4 Detection limit test ug / L

[0072]

[0073] 4. Interference test

[0074] The anti-interference ability of the beryllium automatic analyzer was tested using turbidity, phosphate and metal ion standard solutions to examine the interference of coexisting ions on the detection of beryllium. Phosphate, heavy metal ions, etc. were added to the 20ug / L standard sample, the actual concentration of beryllium was determined, and the relative error was calculated. The results are shown in Table 5.

[0075] Table 5 Interference test results

[0076]

[0077] The test results show that in general water bodies with turbidity less than 100 ntu and surface water within the fifth category of water quality, there will be no interference with beryllium testing.

[0078] 5. Water sample spike recovery test

[0079] Tap water, tap water spiked with 5ug, seawater, and seawater spiked with 5ug were used to test the water sample spike recovery rate of the beryllium automatic analyzer. The results are shown in Table 6.

[0080] Table 6 Water sample spike recovery test results

[0081]

[0082] 6. Comparison test with ICP-MS method

[0083] Blind samples ①-③ were used to conduct comparative tests on the beryllium automatic analyzer, and the results were compared with the ICP-MS method. The results are shown in Table 7.

[0084] Table 7 Comparison test results with ICP-MS method

[0085]

[0086]

[0087] It can be seen from the test results of the above experimental cases that the reagent combination for detecting the beryllium content in water samples provided by the present invention combined with the beryllium automatic analyzer can accurately measure the beryllium concentration in water within the range of the standard calibration curve (range), and has a wide applicability, which can not only meet the detection of high-concentration pollution emission sources, but also be suitable for the detection of low-concentration surface water.

[0088] The existing standard method has relatively complex detection steps, cumbersome operation, many reagents to prepare, short shelf life, and high requirements for personnel. The reagent combination for detecting the beryllium content in water samples provided by the present invention is combined with a beryllium automatic analyzer, which simplifies the reaction steps, has the characteristics of simple operation and less system error, and meets the requirements for surface water beryllium detection.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reagent combination for detecting the content of beryllium in a water sample, characterized in that: The reagent combination consists of a color developer, a masking agent, a buffer solution and a catalytic solution; The developer includes chrome cyanine R; The masking agents include EDTA, ascorbic acid, tartaric acid and ethylene glycol amine; The buffer comprises ammonium acetate and hydrochloric acid; The catalytic liquid includes cetylpyridinium chloride.

2. The reagent combination for detecting the beryllium content in water samples according to claim 1, characterized in that: The color developer is obtained by dissolving chrome cyanine R with a mass concentration of 0.1% to 1% in ethanol and adding water.

3. The reagent combination for detecting the beryllium content in water samples according to claim 1, characterized in that: The masking agent comprises EDTA with a mass concentration of 5-15%, ascorbic acid with a mass concentration of 2-10%, tartaric acid with a mass concentration of 2-10%, ethylene glycol amine with a volume concentration of 5-10%, and the rest is water.

4. The reagent combination for detecting the beryllium content in water samples according to claim 1, characterized in that: The buffer comprises ammonium acetate with a mass concentration of 20-30%, hydrochloric acid with a volume concentration of 2%-5%, and the rest is water.

5. The reagent combination for detecting the content of beryllium in water samples according to claim 1, characterized in that: The catalytic liquid comprises 1-5% by mass concentration of cetylpyridinium chloride, and the rest is water.

6. The reagent combination for detecting the beryllium content in water samples according to claim 1, characterized in that: The dosage ratio of the developer, masking agent, buffer solution and catalyst solution is 0.5-1:0.5-2:0.5-2:0.5-1.

7. An analyzer for detecting the beryllium content in a water sample, characterized in that: The analyzer comprises a metering module (10), a flow path switching control module (20), a detection module (30) and a data processing module; the flow path switching control module (20) is connected to a water sample to be tested, a color developer, a masking agent, a buffer solution and a catalytic solution; the flow path switching control module (20) is connected to the metering module (10) and the detection module (30) respectively, and controls the water sample to be tested, the color developer, the masking agent, the buffer solution and the catalytic solution to enter the detection module (30) after metering through the flow path switching control module (20); the detection module is used for performing a color development reaction and detection on the water sample; and the data processing module is used for processing the detection result.

8. The analyzer for detecting the beryllium content in water samples according to claim 7, characterized in that: The detection module comprises a measuring chamber (31), an optical signal transmitting component (32) and an optical signal receiving component (33), wherein the optical signal transmitting component (32) and the optical signal receiving component (33) are arranged correspondingly, the optical signal transmitting component (32) is used to transmit an optical signal of a preset wavelength, and the optical signal receiving component (33) is used to receive the optical signal passing through the measuring chamber.

9. The analyzer for detecting the beryllium content in water samples according to claim 7, characterized in that: The detection module also includes a temperature control module, which includes a heating device and a cooling device, wherein the heating device is used to allow the reagent in the measurement chamber (31) to react at a constant temperature, and the cooling device is used to cool the measurement chamber (31).

10. A method for detecting the content of beryllium in a water sample, characterized in that: The following steps are involved: The beryllium content in the water sample is detected by using the analyzer for detecting the beryllium content in the water sample as described in any one of claims 7 to 9, the water sample to be tested, the buffer solution, and the masking agent are respectively added to the detection module, and then the color developer and the catalyst are extracted and fully reacted and then spectrophotometric detection is performed, and the beryllium content in the water sample can be calculated.

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