Method for measuring content of silver in high-bismuth material

A determination method and content technology, which is applied in chemical analysis by titration, analysis by causing chemical reaction of materials, material analysis by observing the influence of chemical indicators, etc., can solve the problem of poor reproducibility of results, lack of consideration To avoid problems such as bismuth interference, achieve simple operation, avoid low measurement results, and improve precision

Active Publication Date: 2014-07-16
HUNAN SHUI KOU SHAN NONFERROUS METALS GRP
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  • Abstract
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Problems solved by technology

[0005] 2) The determination of silver content in high-silver materials adopts the lead fire test gold assay method, such as YS / T88-1995 "Determination of gold and silver content in chemical analysis methods for copper and lead anode slime" adopts lead fire method The gold assay method, the upper limit of the determination range of the silver content of this analysis method is 30%, but does not take into account the interference of bismuth
[0009] When the sample is a high-bismuth material, because the properties of bismuth and lead are very similar, the bismuth in the material completely enters the lead buckle during the smelting process. The particles are finally blown by ash, and at this time, when the bismuth is blown by ash, part of the silver is taken away, so that the result of the silver content is low, and the reproducibility of the result is very poor.

Method used

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  • Method for measuring content of silver in high-bismuth material

Examples

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Embodiment 1

[0049] In this embodiment, a method for determining the silver content in a high-bismuth material uses bismuth oxide as a collector for precious metals, which can quantitatively capture the precious metals in the sample, and quantitatively measures the silver content in the sample by bismuth button direct titration; The specific operation steps are as follows:

[0050] 1) Ingredients: Prepare two samples A and B according to the ingredient ratio shown in Table 7, where sample A is added with a test sample, and the weight value of the test sample M=2.1167g is recorded, and sample B is not added with a test sample as a test Contrast, then, put into two test gold crucibles respectively;

[0051] Table 7 The proportion of material ingredients in Example 1 of the assay method for silver content in a high-bismuth material

[0052]

[0053] 2) Melting: After the test gold melting furnace is pre-heated to 900°C, power off; open the furnace door, and put the test gold crucibles wit...

Embodiment 2

[0064] In this embodiment, a method for determining the silver content in a high-bismuth material uses bismuth oxide as a collector for precious metals, which can quantitatively capture the precious metals in the sample, and quantitatively measures the silver content in the sample by bismuth button direct titration; The specific operation steps are as follows:

[0065] 1) Ingredients: prepare two samples A and B according to the ingredient ratio shown in Table 8, wherein sample A is added with a test sample, and the weight value of the test sample M=4.8342g is recorded, and sample B is not added with a test sample as a test Contrast, then, put into two test gold crucibles respectively;

[0066] Table 8 The proportion of material ingredients in Example 2 of the assay method for silver content in a high-bismuth material

[0067]

[0068] 2) Melting: After the test gold melting furnace is pre-heated to 900°C, power off; open the furnace door, and put the test gold crucibles w...

Embodiment 3

[0079] In this embodiment, a method for determining the silver content in a high-bismuth material uses bismuth oxide as a collector for precious metals, which can quantitatively capture the precious metals in the sample, and quantitatively measures the silver content in the sample by bismuth button direct titration; The specific operation steps are as follows:

[0080] 1) Ingredients: Prepare two samples A and B according to the ingredient ratio shown in Table 9, wherein sample A is added with a test sample, and the weight value of the test sample M=1.0549g is recorded, and sample B is not added with a test sample as a test Contrast, then, put into two test gold crucibles respectively;

[0081] Table 9 The proportion of material ingredients in Example 3 of the assay method for silver content in a high-bismuth material

[0082]

[0083] 2) Melting: After the test gold melting furnace is pre-heated to 900°C, power off; open the furnace door, and put the test gold crucibles w...

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Abstract

The invention discloses a method for measuring the content of silver in a high-bismuth material. The measuring method is characterized by comprising the following steps: quantitatively trapping precious metal in a sample with bismuth oxide as a trapping agent of precious metal; smelting the sample at the temperature of 900-1100 DEG C for 30-60 min to obtain a bismuth buckle; dissolving the bismuth buckle by nitric acid and tartaric acid under a heating condition; and titrating with a potassium rhodanide standard solution to measure the content of silver in the sample. The measuring method is simple to operate; the accuracy and recycling rate of the measuring method are high and meet the requirement of an analysis method; the impurity interference is small and the problem that the accuracy of measurement on the content of silver is low due to relatively high impurity content in a high-bismuth material sample is solved.

Description

technical field [0001] The invention relates to a method for determining silver content, in particular to a method for determining silver content in high-bismuth materials. Background technique [0002] At present, the determination of silver content in high-bismuth materials mainly adopts fire assay, and the most commonly used fire assay is lead assay. Lead test gold uses lead oxide as a precious metal collector, and the precious metal is enriched in the lead buckle after smelting, and the lead buckle is ash-blown to obtain precious metal pellets, so as to quantitatively analyze the gold and silver content in the material. [0003] The current analysis methods in my country mainly include: [0004] 1) The determination of silver content in bismuth materials by national standards and industry standards is all instrumental analysis methods, such as YS / T536.4-2010 "Determination of Silver Content in Bismuth Chemical Analysis Methods" uses flame atomic absorption spectrophotom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N21/78
Inventor 夏兵伟曾光明袁培新罗清平彭时军郭飞陈海燕白成庆
Owner HUNAN SHUI KOU SHAN NONFERROUS METALS GRP
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