Method for measuring impurity in high pure gold by plasma atomic emission spectrometer

Abstract

The invention relates to a method for using a plasma atomic emission spectrometer to measure impurities in high-purity gold, which comprises the following steps: weighing one unit of sample in a bunsen beaker, adding aqua regia to dissolve, replenishing hydrochloric acid deionized water to do constant volume to a scale after dissolving, respectively getting sample solution in more than two colorimetric tubes, solution in each tube is 15ml, adding gold standard solution which is mixed by elements according to a multiple relation in turn, doing constant volume by deionized water, starting the plasma atomic emission spectrometer, starting a circulating water pump, opening analytic control software, entering a 'standard addition method' control procedure, choosing a spectral line for measuring in a spectral line base, setting the concentration value of curved lines, scanning a whole band, sucking sample solution in each colorimetric tube in an instrument in turn according to the sequence that the concentration is from low to high, clicking a feeler switch to get an initial curve point of the point after sucking in each time, assuring curved lines, and leading the linear coefficient to be more than 0.99, outputting the concentration value result of each determined element, and calculating the result of the percentage content of each determined element according to the calculating formula.

Description

technical field [0001] The invention relates to a technique for measuring precious metal materials, in particular to a method for measuring impurities in high-purity gold with a plasma atomic emission spectrometer. Background technique [0002] With the development of analysis and detection technology at home and abroad, various detection companies have also improved the analysis and detection level of their products to adapt to the fierce market competition. At present, the analysis methods of high-purity gold in my country (mainly determine Ag, Bi, Cr, Pb, Sb, The content of 14 kinds of impurities including Pd, Si, Mg, Cu, Fe, Ni, Mn, As, Sn) is carried out according to the national standard GB / T11066-89, and its analytical instruments are mainly atomic absorption spectrometer and arc light source emission spectrometer, The sample analysis and processing process is complex, time-consuming, and consumes more reagents and glassware. [0003] In the determination of impurity e...

AI Technical Summary

Problems solved by technology

However, these determination methods all have defects: the defects of the first two determination methods are to measure various impurities one by one, and the total determination result is slow; the arc excitation and spectroscopic determination rules have a great influence on the alloy composition, and the preparation of standard samples High-purity gold and other substrates are required, and the loss of gold standards and samples is relatively large

In this process, it is easy to "contaminate" the sample according to the previous measurement method mode, thus affecting the authenticity of the measurement data

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