Method for analyzing and measuring silver content in chromium bronze alloy

A measurement method, the technology of chromium bronze, applied in the field of chemical detection, can solve the problems that cannot meet the requirements of chromium bronze alloy, etc., and achieve the effect of easy operation and high accuracy of results

Active Publication Date: 2013-06-19
白银有色西北铜加工有限公司
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  • Abstract
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Problems solved by technology

Because the chromium bronze alloy has the characteristics of high strength, high hardness, wear resistance and high melting point of chromium (1857°C), when the content of silver element is determined by the existing chemical analysis method, the single acid specified in the analysis method is difficult Completely dissolve the chromium bronze alloy sample, which cannot meet the determination of the silver content in the chromium bronze alloy

Method used

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  • Method for analyzing and measuring silver content in chromium bronze alloy
  • Method for analyzing and measuring silver content in chromium bronze alloy
  • Method for analyzing and measuring silver content in chromium bronze alloy

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Embodiment

[0062] Weigh 10.0000g of pure copper, the weight percentage of silver in the pure copper is less than 0.0010%, put it in a 500mL beaker, add 50mL of nitric acid solution (1+3), heat to dissolve the pure copper, boil to remove nitrogen oxides in the solution , cooled, transferred to a 200mL volumetric flask, diluted with water to the mark, and mixed to obtain a copper solution, containing 50mg of copper per milliliter of the copper solution;

[0063] Weigh 0.5656g of dried potassium dichromate reference reagent, put it in a 250mL beaker, dissolve it in water, add 5mL of sulfuric acid with a density of 1.84g / mL, after cooling, add dropwise a 30% hydrogen peroxide solution, and place it until When the yellow color disappears, transfer it to a 1000mL volumetric flask, dilute to the mark with water, and mix well to obtain a chromium solution, which contains 200μg chromium per milliliter;

[0064] Weigh 0.1228g of cerium oxide, put it in a 300mL beaker, then add 10mL of water, 5mL o...

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Abstract

The invention discloses a method for analyzing and measuring silver content in a chromium bronze alloy. The method comprises the following steps of: preparing a copper solution, a chromium solution, a rare earth solution and a silver standard working solution respectively, preparing the silver standard working solution into a series standard solution, drawing a working curve of the series standard solution, dissolving a chromium bronze alloy sample, and thus obtaining a solution in which the sample is dissolved; measuring absorbance of the solution in which the sample is dissolved; and calculating the silver content in the chromium bronze sample. By the analysis and measurement method, the silver content in the chromium bronze alloy can be accurately measured, and a gap that a method for measuring the silver content in the chromium bronze alloy formed by adding silver and rare-earth cerium into chromium bronze does not exist in the prior art is filled; and the method is easy to operate and high in accuracy. Moreover, the problem of difficulty in elemental analysis in the product development process is solved, and advantages are created for product marketization and large-scale production.

Description

technical field [0001] The invention belongs to the technical field of chemical detection, and relates to a chemical analysis method for determining element content in chromium bronze alloys, in particular to an analysis and determination method for silver content in chromium bronze. Background technique [0002] Adding silver and rare earth cerium to chromium bronze constitutes a new chromium bronze alloy mainly used in the production of high-speed railway contact wires. The chromium bronze alloy contains 0.40-1.10% Cr, 0.05-0.10% Ce, and less than 0.1 % Fe, less than 0.05% Ni, and 0.05-0.20% Ag. Because the chromium bronze alloy has the characteristics of high strength, high hardness, wear resistance and high melting point of chromium (1857°C), when the content of silver element is determined by the existing chemical analysis method, the single acid specified in the analysis method is difficult Thoroughly dissolving the chrome-bronze alloy sample cannot satisfy the determ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/33
Inventor 杨永刚赵义杨桂平邓予生薛永庆任妍利
Owner 白银有色西北铜加工有限公司
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