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Method for detecting element content in alloy or ore by utilizing ICP emission spectrometer

A technology of element content and spectrometer, which is applied in the field of detecting the content of various elements in alloys or ores, can solve the problems of poor control of accuracy, long detection cycle, and difficulty in controlling accuracy, so as to shorten the measurement cycle and achieve stable detection results. The effect of less distracting factors

Inactive Publication Date: 2011-11-16
DATONG ELECTRIC LOCOMOTIVE OF NCR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example: the analysis of iron ore, the traditional analysis method is to use high temperature alkali fusion sample, after acidification, add oxidizing agent, reducing agent, masking agent, protective agent and color developing agent to form a compound that can be accurately analyzed without interference, and then use Spectrophotometry, atomic absorption spectrometry or gravimetry are used to determine the element content in the sample; only one element can be determined for each sample dissolved, and a variety of chemical reagents are added from sample dissolution to final analysis to undergo a series of chemical reactions process, which will inevitably lead to a cumbersome operation process, and each step may introduce errors. As a result, the analysis speed is slow and the accuracy is not necessarily high.
[0003] The classical detection methods currently used have the following disadvantages: 1. The analysis of each element needs to prepare its own solution; 2. The acid effect, salt effect, complexation effect, coprecipitation and impurity interference need to be considered in the detection 3. The error caused by the reagent is difficult to estimate, and the accuracy is not easy to control; 4. The detection cycle is often long. For example, for an iron ore sample, if 6 elements are analyzed, a skilled worker needs at least 6- 8 days
Therefore, the traditional chemical analysis method is used to analyze the sample, the operation is cumbersome, and the accuracy is difficult to control.

Method used

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  • Method for detecting element content in alloy or ore by utilizing ICP emission spectrometer
  • Method for detecting element content in alloy or ore by utilizing ICP emission spectrometer
  • Method for detecting element content in alloy or ore by utilizing ICP emission spectrometer

Examples

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Effect test

Embodiment 1

[0027] The preparation of embodiment 1 copper alloy test solution

[0028]Weigh 0.1000g of the copper alloy sample, place it in a 100mL steel volumetric flask, add 10mL of hydrochloric acid solution (hydrochloric acid (ρ is 1.19g / mL): water = 1:1, volume ratio) 10mL, add dropwise hydrogen peroxide ( ρ is 1.10g / mL) 1-2mL; put the steel volumetric flask on the electric heating plate, heat and dissolve the sample at low temperature (100-300°C), wait until the sample is completely dissolved and bubbles appear, indicating that the hydrogen peroxide has been completely destroyed ; Take off the volumetric flask, cool it down, dilute it to the mark with distilled water, and shake it up to get the copper alloy test solution; if there is precipitation, perform dry filtration.

Embodiment 2

[0029] The preparation of embodiment 2 aluminum alloy test solution

[0030] Weigh 0.1000g of the aluminum alloy sample, place it in a 250mL polytetrafluoroethylene beaker, add about 2g of sodium hydroxide, inject a small amount of distilled water; When the aluminum alloy sample is almost invisible to the naked eye at the bottom of the liquid, it is considered to be completely dissolved), after standing still, remove the beaker, add nitric acid solution (nitric acid (ρ is 1.42g / mL): water = 1:2, volume ratio) 40mL, Transfer the solution into a 250mL tall beaker, add 2 drops of hydrogen peroxide (ρ is 1.10g / mL), wash the polytetrafluoroethylene beaker with distilled water 3-4 times, mix the washing liquid into the tall beaker, stir well, Place the tall beaker on an electric stove and heat to boil for about 30 seconds; remove the tall beaker, cool it down, transfer the solution into a 200mL volumetric flask, dilute to the mark with distilled water, shake well, and get the alumin...

Embodiment 3

[0031] The preparation of embodiment 3 low alloy steel test solution

[0032] Weigh 0.2000g of low-alloy steel sample and place it in a 100mL steel volumetric flask;

[0033] For CrMo-free steel, add 20mL of nitric acid solution (nitric acid (ρ is 1.42g / mL): water = 1:3, volume ratio), heat and dissolve the sample at low temperature (100-300°C), and wait until the sample is completely dissolved ( It is advisable that the test solution has large bubbles), add (50g / L) ammonium persulfate solution 10mL, boil until large bubbles appear, remove, cool, dilute to the mark with distilled water, shake well, and obtain a CrMo-free steel test solution;

[0034] For CrMo steel and tool steel: add mixed acid (sulfuric acid (ρ is 1.84g / mL): phosphoric acid (ρ is 1.69g / mL): water = 15:15:80, volume ratio) 10mL, low temperature (100-300°C ) and heat to dissolve. After the sample stops dissolving, slowly add about 1mL of nitric acid to destroy the carbides, continue to boil until smoking for ...

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Abstract

The invention relates to a method for detecting the element content in alloy or ore by utilizing an ICP emission spectrometer, comprising the following steps: placing the alloy or the ore in solvent, heating and leading the alloy or the ore to be dissolved fully in solution to obtain mixed solution; diluting the mixed solution to obtain test solution; selecting the optimal analysis line of each element according to the composition of substrate of the alloy or the ore; preparing a set of corresponding standard solutions with the concentration sequencing from low to high according to the concentration index of each element in the alloy or the ore; introducing the standard solutions to the ICP emission spectrometer to measure the emission light intensity of the element analysis line and to draw a standard curve; introducing the test solution to the ICP emission spectrometer to measure the emission light intensity corresponding to each element; and determining the content of each element according to the standard curve. The method can detect simultaneously the content of the required element and oxide only by one solution, therefore, the invention has simple operation, shortened measuring cycle, stable detection results with high accuracy degree.

Description

technical field [0001] The invention relates to a method for detecting the contents of multiple elements in alloys or ores, in particular to a method for simultaneously detecting the contents of multiple elements in alloys or ores using an ICP emission spectrometer. Background technique [0002] In the field of detection of element content, classical chemical analysis methods are often used for the detection of copper alloys, aluminum alloys, alloy steels and iron ores. For example: the analysis of iron ore, the traditional analysis method is to use high temperature alkali fusion sample, after acidification, add oxidizing agent, reducing agent, masking agent, protective agent and color developing agent to form a compound that can be accurately analyzed without interference, and then use Spectrophotometry, atomic absorption spectrometry or gravimetry are used to determine the element content in the sample; only one element can be determined for each sample dissolved, and a va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/73G01N1/28G01N1/44
Inventor 詹会霞柴艳英董亚红崔兴菊
Owner DATONG ELECTRIC LOCOMOTIVE OF NCR
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