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| 固体废物浸出液中氰化物测定方法的探讨 |
| Discussion on the Determination of Cyanide in Leaching solution of Solid Waste |
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| DOI： |
| 中文关键词: 氰化物 浸出液 分光光度法 固体废物 |
| 英文关键词: Cyanide Leaching fluid Solid waste |
| 基金项目:2009年环保部标准制修订基金资助项目（1121） |
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| 中文摘要: |
| 用金矿废渣样品进行氰化物的浸提试验，对浸提剂的pH值、浸提次数等条件进行优化。经实际样品验证，确定pH值>12的碱性水溶液为最佳浸提剂，浸出液中易释放氰化物和总氰化物可用硝酸银滴定法或异烟酸-巴比妥酸分光光度法测定，方法检出限分别为0.25 mg/L、0.001 mg/L，加标回收率为90.0%~92.0%，测定结果的RSD<8%。 |
| 英文摘要: |
| Determining of cyanide in solid wastes was investigated, using a kind of slag waste as actual sample. Experimental conditions such as the pH of leaching fluid and extraction times were optimized. It had been verified by the actual sample that alkaline solution(pH≥12) could be used as the best extraction fluid. Easily literatable cyanide and total cyanide in leaching liquid could be measured by silver nitrate volumetric and nicotinic barbituric spectrophotometry method. The method detection limits come to be 0.25 mg/L and 0.001 mg/L, the recoveries ranged from 90.0% to 92.0%, and the precision was lower to 8%. |
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