锌—色氨酸配合物的吸附伏安特性及其应用  

THE ADSORPTIVE VOLTAMMETIC CHARACTERISTICS OF Zn-TRYPTOPHAN COMPLEX AND ITS APPLICATION

作　　者：黄海兰[1] 马成松[1] 王丽增[1] 张晓丽[1] 

机构地区：[1]山东大学化学系

出　　处：《山东大学学报（自然科学版）》1997年第1期98-103,共6页Journal of Shandong University(Natural Science Edition)

摘　　要：研究了锌－色氨酸－硼砂体系的吸附伏安特性．在０．０１ｍｏｌ／Ｌ硼砂底液中（ｐＨ＝９．５），锌－色氨酸配合物在－１．１５Ｖ（ＶＳ．ＳＣＥ）出现一灵敏吸附还原峰．通过对该峰的性质及反应机理的研究，确认此峰为配合物吸附还原峰，吸附反应物为锌与色氨酸形成的１∶２配合物，电极反应为二电子还原，在合适的条件下，该还原峰峰高与锌浓度在１．０×１０－７～７．５×１０－６ｍｏｌ／Ｌ范围内成线性关系，检测下限为１．５×１０－８ｍｏｌ／Ｌ，用此法测定生物样品中的微量锌。In 0.01mol/L borax buffer solution(pH=9.5),Zn tryptophan complex could give a sensitive reduction peak whose peak potential was at-1.15V(VS.SCE).This peak was studied to be a complex adsorption peak.The adsorbed reactant was a complex formed by Zn 2+ and tryptophan whose complex ratio was 1∶2.The electrode reaction was proved to be a two electron reductive reaction.Under optimum experimental condition,the derivative peak current and the concentration of Zn had a linear relation between 1.0×10 -7 and 7.5×10 -6 mol/L.The detection limit was 1.5×10 -8 mol/L.This method had been used to determine the content of Zn in biochemical samples and satisfactory results were got.

关 键 词：锌 色氨酸 配合物 吸附 伏安特性 

分 类 号：O614.241[理学—无机化学] O657.14[理学—化学]