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

An atomic emission and plasma technology, which is used in the preparation of test samples, electrical excitation analysis, material excitation analysis, etc., can solve the problems of large gold standard and sample loss, affecting the authenticity of measurement data, and large influence of alloy composition. , to achieve the effect of small matrix loss, fast measurement speed and high accuracy

Active Publication Date: 2009-01-21
BEIJING INST OF NONFERROUS METALS & RARE EARTH
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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

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

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Experimental program
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Effect test

Embodiment 1

[0063] Impurity detection for a high-purity gold wire:

[0064] The specific determination method steps are as follows:

[0065] 1. Clean the sample

[0066] Weigh about 2 g of high-purity gold wire, boil the sample with (1+1) hydrochloric acid for 15 minutes, rinse it with deionized water, and dry it in a plexiglass glove box with an infrared lamp.

[0067] 2. Sample dissolution

[0068] Weigh 1.000 g of the above-mentioned cleaned high-purity gold wire sample into a 100 ml quartz beaker, add 15 ml of aqua regia, cover with a watch glass, place it on an electric heating plate and heat at low temperature (about 60-80°C) to dissolve. After the sample is completely dissolved, transfer it to a 100ml volumetric flask when it is cooled to room temperature, add 5ml of hydrochloric acid, and dilute to the mark with deionized water. The concentration of the solution is C (C=0.01g / ml).

[0069] 3. Sample separation and standard addition

[0070] Separate the sample solution into fo...

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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...

Claims

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Application Information

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IPC IPC(8): G01N21/66G01N1/34
Inventor 王新业郅富国许丽娟严素荣
Owner BEIJING INST OF NONFERROUS METALS & RARE EARTH
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