Method for determining arsenic, antimony and bismuth content of pure chromium by using atomic fluorescence spectrometry

Abstract

The invention discloses a method for determining the arsenic, antimony and bismuth content of pure chromium by using atomic fluorescence spectrometry. The method comprises the following steps of: weighing a specimen; preparing a sample solution; preparing a calibration solution; drawing a working curve; measuring the concentrations of arsenic, antimony and bismuth in the sample solution; and calculating measurement results to obtain the arsenic, antimony and bismuth content. The method for determining the arsenic, antimony and bismuth 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 arsenic, antimony and bismuth 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 arsenic, the antimony and the bismuth, 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 belongs to alloy trace element analysis technology and belongs to the technical field of alloy element analysis and measurement. Background technique [0002] With the development of the national defense industry, new materials are constantly introduced, and the requirements for various materials with excellent performance are becoming more and more stringent. The content of impurity elements in the alloy is very important to the performance of the material. The existence of will seriously affect the performance of the material, once its content exceeds the allowable limit, it will bring great harm to the alloy. Purification of alloy components must first control the impurity components of raw materials. Only high-purity raw materials can smelt high-purity alloys. As an important raw material of superalloys, pure chromium needs to strictly control the above-mentioned low melting point elements. However, after checking domestic and forei...

AI Technical Summary

Problems solved by technology

[0004] Inductively coupled plasma mass spectrometer (ICP-MS) is expensive, with high cost of use and maintenance, strict requirements on the environment and reagents, and the measurement of element As is greatly disturbed, resulting in a high detection limit; atomic absorption spectrometry (AAS ) processing process is complicated, and the sensitivity is relatively low; atomic fluorescence technology is highly sensitive in determining As, Sb, Bi, the instrument is cheap, and the processing process is simple, but atomic fluorescence technology is mostly used in food, biology, etc., but not in raw materials Field metal chemical analysis

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