镉(Ⅱ)在缔合物体系中的电极过程和应用  

The Electrode Process and Application of Cadmium(Ⅱ)in the Associated System

作　　者：张月霞[1] 阎美占 康乐[1] 

机构地区：[1]冶金部钢铁研究总院,北京100081 [2]北京科技大学1986级

出　　处：《分析化学》1991年第5期519-523,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助课题

摘　　要：本文详细研究了镉(Ⅱ)-碘化钾-乙基紫体系的示波极谱行为,讨论了阴离子表面活性剂增敏机理,运用一系列电化学手段研究了其电极过程,测得缔合物组分比及有关參数,提出了电极反应机理。最佳条件下,该体系极稳定,并具高的灵敏度和选择性。线性范围为0.002～0.24μgCd(Ⅱ)/ml,检出限为0.4ng Cd(Ⅱ)/ml。测定复杂合金中痕量镉,结果满意.The oscillopolarographic behaviour of Cd(Ⅱ)-KI-ethyl violet system was investigated in detail.The enhancement mechanism of anion surfaetant was discussed and the electrode process has been studied by using the different electrochemical methods.The composition ratio of above ion-associate and corresponding parameters were determined. The mechanism of electrode reaction was described.Under the optimal condition,the ion- -associate system mentioned above was very steady,sensitive and selective.The peak height was directly proportional to the concentration of cadmium(Ⅱ)in the range of 0.002～0.24μg/ml,and the detection limit was 0.4ng Cd(Ⅱ)/ml.The proposed method has been applied to the determinaion of trace amount of cadmium in the complicated alloy with satisfactory results.

关 键 词：镉(Ⅱ) 示波极谱 缔合物 电极过程 

分 类 号：O614.242[理学—无机化学]