A kind of determination method of silver content in high bismuth material

A determination method and content technology, which can be used in chemical analysis by titration, analysis by chemical reaction of materials, and material analysis by observing the impact on chemical indicators, which can solve the problem of poor reproducibility of results and failure to consider To avoid problems such as the interference of bismuth, to achieve the effect of simple operation, avoiding low measurement results and high precision

CN103926372BActive Publication Date: 2015-09-09HUNAN SHUI KOU SHAN NONFERROUS METALS GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-09-09

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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.
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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...

Examples

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...