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Joint measurement method of impurity elements in silver

An impurity element, silver technology, applied in the preparation of test samples, material excitation analysis, thermal excitation analysis, etc., can solve the problems of low results and long analysis time, and achieve the effect of shortening time and maintaining accuracy

Active Publication Date: 2011-12-14
山东黄金冶炼有限公司
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AI Technical Summary

Problems solved by technology

[0007] These methods measure gold, platinum and other elements separately from elements soluble in nitric acid, and the analysis time is long. In addition, when analyzing elements insoluble in nitric acid, they are affected by the environment, reagents and long processes, resulting in low results.

Method used

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  • Joint measurement method of impurity elements in silver

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Embodiment 1

[0030] A joint measurement method for impurity elements in silver, comprising the following steps:

[0031] The first step: sample processing, use a flaking machine to crush high-grade silver into thin slices of about 0.2mm, first treat the sample with 0.9% hydrochloric acid, wash it with distilled water, wipe the sample with alcohol, and dry it for later use.

[0032] Step 2: Weigh 1 gram of sample and add 0.5 ml of sodium citrate complexing agent and 10 ml of 1:1 nitric acid to dissolve the sample in a beaker.

[0033] Step 3: When the reaction is complete, add 1ml of saturated sodium chloride solution, heat and boil to clarify the solution, and pour it out into the funnel for filtration by decanting.

[0034] Step 4: Add 15ml of aqua regia and 1ml of saturated sodium citrate complexing agent to the silver chloride precipitate in the beaker, heat to boil for 20min, and then use the method in the previous step to filter.

[0035] The fifth step is to add 10ml of aqua regia a...

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Abstract

The invention provides a simultaneous measuring method for impurity elements in silver. The method provided by the invention comprises the following steps: dissolving nitric acid, precipitating sodium chloride, filtering, complexing, dissolving aqua regia, filtering, complexing, dissolving the aqua regia, refiltering, measuring by utilizing an ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry) and the like. By utilizing the method provided by the invention, a method for respectively measuring elements which are dissolved in the nitric acid and are not dissolved in the nitric acid by utilizing different methods is changed, more than a half of analysis time is shortened, the method provided by the invention is easy to learn and use, is easy to popularize and apply and also maintains higher accuracy.

Description

technical field [0001] The invention relates to a method for simultaneously determining the contents of gold, platinum and other elements in high-grade silver. Background technique [0002] At present, the determination method of silver is mainly to determine the content of each element separately by atomic absorption spectrophotometry. Among them, the determination of gold and platinum is to dissolve the sample with nitric acid and filter it with absorbent cotton, leave the insoluble matter on the funnel, then burn the filtered residue and insoluble matter together, dissolve them in aqua regia, and use atomic absorption spectrophotometry after constant volume Its content; the determination of other elements is first dissolved with nitric acid, then precipitated with hydrochloric acid, heated to clarify, poured out the liquid, then added a certain volume of aqua regia and complexing agent to the solid and heated for a certain period of time, then poured out the liquid, Rehe...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/34
Inventor 周发军孙玉刚张永胜殷晓斌
Owner 山东黄金冶炼有限公司
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