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Method for determining element of aluminum fluoride using X ray fluorescence spectrophotometry

A technology of fluorescence spectroscopy and fluorescence spectrometer, which is applied in the field of determination of elements in aluminum fluoride by X-ray fluorescence spectroscopy, can solve the problems of high testing cost and low work efficiency, improve accuracy, improve work efficiency, and save testing cost Effect

Inactive Publication Date: 2007-10-24
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the ISO and national standards of aluminum fluoride, wet chemical analysis is mainly used for elemental analysis, including titration, spectrophotometry, gravimetric method and atomic absorption spectrometry. The analysis of sulfur content also uses X-ray fluorescence spectrometry. Its calibration curve uses spectrally pure aluminum fluoride and high-purity sulfate to prepare standard samples, and only one component can be measured, which results in low work efficiency and high test costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Aluminum fluoride samples produced by a domestic factory.

[0022] Weigh 8.0000g of the mixed flux of lithium tetraborate and lithium metaborate in a porcelain crucible, mix evenly, transfer a part into a platinum-gold crucible, weigh 1.2000g of a sample in a platinum-gold crucible, mix it with the flux evenly, and put the remaining The flux was transferred into the platinum-gold crucible and covered the upper layer. Add 1 drop of lithium bromide saturated solution, put it into a melting machine at 1000°C for 10 minutes, and cast to prepare a glass sheet. Standard samples were prepared in the same way.

[0023] Establish a quantitative measurement program, use the theoretical α coefficient to correct the overlapping interference of spectral lines between elements and the matrix effect, calculate the relationship between the X-ray intensity of the analyzed elements in the standard sample and its concentration, and calculate the calibration curve constants a, b, c and sp...

Embodiment 2

[0028] Aluminum fluoride samples produced by a domestic factory.

[0029] Weigh 8.0000g of the mixed flux of lithium tetraborate and lithium metaborate in a porcelain crucible, mix evenly, transfer a part into a platinum-gold crucible, weigh 1.2000g of a sample in a platinum-gold crucible, mix it with the flux evenly, and put the remaining The flux was transferred into the platinum-gold crucible and covered the upper layer. Add 1 drop of lithium bromide saturated solution, put it into a melting machine at 1000°C for 10 minutes, and cast to prepare a glass sheet.

[0030] Start the quantitative analysis program and measure a check sample of known concentration prepared in the same batch as the unknown sample. The analysis results of each element in the inspection sample must meet the error requirements. Enter the unknown sample name and measure the unknown sample.

[0031] According to the X-ray measurement intensity of unknown samples, the content is calculated by computer ...

Embodiment 3

[0034] Aluminum fluoride standard sample produced by a domestic factory.

[0035] Weigh 8.0000g of the mixed flux of lithium tetraborate and lithium metaborate in a porcelain crucible, mix evenly, transfer a part into a platinum-gold crucible, weigh 1.2000g of a sample in a platinum-gold crucible, mix it with the flux evenly, and put the remaining The flux was transferred into the platinum-gold crucible and covered the upper layer. Add 1 drop of lithium bromide saturated solution, put it into a melting machine at 1000°C for 10 minutes, and cast to prepare a glass sheet.

[0036] Start the quantitative analysis program and measure a check sample of known concentration prepared in the same batch as the unknown sample. The analysis results of each element in the inspection sample must meet the error requirements. Enter the unknown sample name and measure the unknown sample.

[0037] According to the X-ray measurement intensity of unknown samples, the content is calculated by c...

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Abstract

The invention relates to a method for using X-ray fluorescence spectrum method to measure the components of aluminum fluoride, characterized in that the test process comprises that a, fusing a standard sample and a sample borate mixture solvent into a glass sample at 980-1000Deg. C, b, using X-ray fluorescence spectrum method to measure the fluorescence strength of standard sample to make a correct curvature, c, using a X-ray fluorescence spectrometer to measure the strength and the component contents of the sample. The invention can accurately and quickly measure the component contents of aluminum fluoride, to improve measurement accuracy, meet the demands of aluminum fluoride industry and user, improve working efficiency and save test cost.

Description

technical field [0001] The invention relates to a method for determining elements in aluminum fluoride by X-ray fluorescence spectrometry. Background technique [0002] my country is a big producer of aluminum fluoride, and the production capacity and output of aluminum fluoride for aluminum electrolysis are continuously increasing. my country has become the world's largest exporter of aluminum fluoride. The international trade volume of aluminum fluoride for aluminum electrolysis has grown rapidly. It is increasingly important to quickly and effectively determine the product composition of aluminum fluoride, and then determine the product grade. At present, in the ISO and national standards of aluminum fluoride, elemental analysis mainly adopts wet chemical analysis, including titration, spectrophotometry, gravimetric method and atomic absorption spectrometry. The analysis of sulfur content also uses X-ray fluorescence spectrometry. Its calibration curve uses spectroscopi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223
Inventor 张爱芬张树朝马慧侠
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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