期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
Catalytic Kinetic Potentiometry Determination of Trace Gold after Separation and Enrichment by Polyamide
摘要/Abstract
研究了以痕量Au(Ⅲ)为催化剂、α,α′联吡啶作活化剂,以铁氰化钾与EDTA之间的配位反应为指示反应的新的催化动力学电位法.该方法用氰电极测定反应中释放出来的氰化物,测定金的线性范围为1 .0×10-10～ 5.0×10-6mol/L.采用聚酰胺分离富集可以除去干扰离子的影响,该法用于矿样品中痕量金的测定,结果令人满意.
A new catalytic potentiometry method has been developed for the determination of gold , withthe ligand exchange reaction between potassium ferricyanide and EDTA used as indicatiry reaction and theα, α′-dipyridyl used as activator.In the method , the cyanide released from the catalytic reaction is deter-mined by cyanide electrod , and its amounts is proportional to the concetration of Au(Ⅲ)over a range of 1 .0×10-10～ 5.0×10-6mol/ L .Samples were dissolved in aqua regia the trace gold was separation and enrichment bypolyamide .The method has been applied to the determination of trace gold with satisfactory results .