Method for determining selenium and tellurium content of pure chromium by using atomic fluorescence spectrometry

Abstract

The invention discloses a method for determining the selenium and tellurium content of pure chromium by using atomic fluorescence spectrometry. The method comprises the following analysis steps of: weighing a specimen; preparing a sample solution; preparing a calibration solution; drawing a working curve; measuring the concentrations of selenium and tellurium in the sample solution; and calculating measurement results to obtain the selenium and tellurium content. The method for determining the selenium and tellurium content of the pure chromium is a hydride generation atomic fluorescence method, is high in analysis sensitivity, convenient to operate, short in analysis cycle and high in efficiency, has broad application prospect, and can be used for measuring the impurities selenium and tellurium in the pure chromium which is a widely used raw material. Brazing performance can be greatly influenced by low-melting point impurity elements such as the selenium and the tellurium, and the like, and once the content of the elements exceeds a standard, the mechanical performance of materials can be greatly degraded, so that an accurate and reliable method is required by the measurement of the content of the elements. The requirements of scientific researches and production on control over the quality of raw materials are met, the rejection rate of the product is lowered, and development and production cost is saved.

Description

technical field [0001] The invention relates to a method for measuring the content of selenium and tellurium in pure chromium by atomic fluorescence spectrometry, and belongs to the technical field of alloy trace element analysis. Background technique [0002] With the development of the national defense industry, new materials are constantly introduced, and the requirements for the composition of various materials with excellent performance are becoming more and more stringent. The content of impurity elements in the alloy has a very important influence on the performance of the material. Purification of alloy components must first control the impurity components of raw materials. Only high-purity raw materials can smelt high-purity alloys. At present, after checking domestic and foreign standards such as national standards, national military standards, navigation marks, non-ferrous standards, ASTM, it is found that there is no detection method standard for the analysis of ...

AI Technical Summary

Problems solved by technology

[0004] Inductively coupled plasma mass spectrometer (ICP-MS), when measuring elements Se and Te, due to the serious interference of mass spectrum, the detection limit of measurement is high; the processing process of atomic absorption spectrometry (AAS) is complicated, and the sensitivity is relatively low; Se and Te have high sensitivity, the instrument is cheap, and the processing process is simple. However, atomic fluorescence technology is mostly used in food, biology, etc., and has not been used in metal chemical analysis in the field of raw materials.

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