聚酰胺分离富集催化动力学电位法测定痕量金  

Catalytic Kinetic Potentiometry Determination of Trace Gold after Separation and Enrichment by Polyamide

作　　者：李慧芝[1] 许崇娟[1] 翟殿棠[1] 

机构地区：[1]济南大学化学化工学院,山东济南250022

出　　处：《河北师范大学学报（自然科学版）》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)

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.

关 键 词：催化动力学 Au(Ⅲ) 氰电极 电位法 

分 类 号：O657.15[理学—分析化学] O614.123[理学—化学]