锌—二氧化锰干电池电液中痕量铅的微分脉冲极谱法测定  

Determination of Trace Lead in Electrolyfe of Dry Cell by Differential Pulse Polarography

作　　者：杨生恕[1] 俞征[1] 

机构地区：[1]贵州大学化学系,贵阳550025

出　　处：《贵州大学学报（自然科学版）》1996年第4期224-227,共4页Journal of Guizhou University:Natural Sciences

基　　金：贵州省科委;省教委自然科学基金资助课题

摘　　要：本文研究了采用微分脉冲极谱法测定锌-二氧化锰干电池电液中痕量铅的各项实验条件.提出不加入任何试剂,直接利用电液中的 Z_nCl_2-NH_4Cl 作为支持电解质,可得 Pb^(2+)的微分脉冲极谱图.在此底液中,Pb^(2+)还原的峰电位为-0.45V(相对于 Ag-AgCl 电极·实验值),峰电流 i_p 与 Pb^(2+)浓度 C_(Pb^(2+))件在0～2.0pg/ml 内线性关系良好.方法简便快速,可靠实用.Experiment conditions for determination of trace lead in the electrolyte of dry cell using differential pulse polarography had been studied.Without adding any reagent.ZnCl_2 and NH_4Cl in the electrolyte was used as supporting electrolyte.It was found that the peak poten- tial of polarographic ware was-0.45V(VS.Ag-AgCl electrode).Linear relation for peak current i_p to C_(Pb^(2+))(0～2.0μg/ml)was good This method was fast and practical.

关 键 词：锌-二氧化锰干电池 电液中铅 微分脉冲极谱法 

分 类 号：TM911.1[电气工程—电力电子与电力传动]