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| Determination of Silver in High Bismuth Slag by Bismuth Fire Assaying Method |
| Received:August 27, 2014 Revised:December 08, 2014 |
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| DOI：doi:10.3969/j.issn.2095-1035.2015.01.014 |
| KeyWord:bismuth assay;lead assay;materials with high bismuth;lead anode mud;silver content |
| Author | Institution |
| XIA Bingwei |
五矿铜业湖南有限公司，湖南 衡阳 |
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| Abstract: |
| As the most frequently used fire assaying method, the lead fire assaying method provides bad accuracy and low Ag content when it is applied to the determination of Ag in high Bismuth slag (Bismuth percent content >15%). A method for the determination of Ag in lead anode mud with high Bismuth by Bismuth fire assaying was investigated. Analytical conditions were obtained through comparison of the analysis process of Bismuth assaying and Lead assaying method, the interference of the incidental elements such as Sb, Cu, As, Ni and Pb in the Bismuth assaying method, and contrast of direct titration by dissolving Bismuth button and titration with second assaying of cupellation of Bismuth button. The accuracy and recovery of the method were investigated by a number of units. The relative standard deviations (RSDs) were 0.32%~0.84% with 96.38%~100.62% recoveries. |
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