Method for measuring impurities in 4-5N high-purity tin by plasma atomic emission spectrometer

Abstract

The invention provides a method for measuring impurities in 4-5N high-purity tin by a plasma atomic emission spectrometer, comprising the following steps of: weighing one unit of a sample, dissolving by adding aqua regia into a beaker, completely dissolving, replenishing hydrochloric acid, continuously heating at low temperature, repeating twice, finally replenishing hydrochloric acid, putting into a 100mL volumetric flask, and setting the volume at degree scale by deionized water for later measurement; remaining a pre-prepared standard work curve with the concentration from low to high for later use; and turning on the plasma atomic emission spectrometer, turning on a water circulating pump, turning on analysis control software, entering a 'standard curve method' control program, selecting a spectrum line for detecting in a spectrum line bank, setting a curve concentration value, carrying out full-wave band scanning, sequentially sucking sample solution of the standard work curve into the spectrometer according to a sequence that the concentration is from low to high, clicking a test key to obtain an initial curve point of the point after suction at each time, confirming the curve, so as to enable the linear coefficient of the curve to be more than 0.99, sucking solution to be measured into the spectrometer, outputting concentration value results of each element to be measured, and obtaining percentage content results of each element to be measured according to a calculation formula.

Description

technical field [0001] The invention relates to a measurement technology for heavy metal materials, in particular to a method for measuring impurities in 4-5N high-purity tin with a plasma atomic emission spectrometer. Background technique [0002] High-purity tin is mainly used to prepare compound semiconductors, high-purity alloys, superconducting material solders and dopants for compound semiconductors. It has the characteristics of good ductility, good plasticity and corrosion resistance. Tin-containing alloys and organic compounds are widely used in atomic energy industry, aviation, shipbuilding, chemical industry, nuclear, medical equipment, ceramic glaze, printing, pesticides, preservatives, antifouling agents, flame suppression agents, catalysts, etc. With the development of analysis and testing technology at home and abroad, various testing companies have correspondingly improved the analysis and testing level of their products in order to adapt to the fierce marke...

AI Technical Summary

Problems solved by technology

[0005] However, how to use the inductively coupled plasma emission spectrometer to measure the impurities in 4-5N high-purity tin has not been effectively solved. The main reason is that it is necessary to find a suitable test environment and a matching measurement line.

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