摘要
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, with the ligand exchange reaction between potassium ferricyanide and EDTA used as indicatiry reaction and the α, α′-dipyridyl used as activator. In the method, the cyanide released from the catalytic reaction is determined 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^-6 mol/L. Samples were dissolved in aqua regia the trace gold was separation and enrichment by polyamide. The method has been applied to the determination of trace gold with satisfactory results.
出处
《河北师范大学学报(自然科学版)》
CAS
北大核心
2006年第1期70-72,共3页
Journal of Hebei Normal University:Natural Science
基金
山东省教育厅计划项目(02C05)
关键词
催化动力学
Au(Ⅲ)
氰电极
电位法
catalytic kinetic
gold
ion selective electrode
potentiometry method