摘要
在乙醇胺-盐酸和0.3％抗坏血酸溶液中(pH9.3),用单扫示波极谱法于-0.62V(vs.SCE)可得到Pb(Ⅱ)-抗坏血酸配合物吸附波。铅含量在9.6×10^(-9)～2.4×10^(-6)mol/L范围内与波高有线性关系,检检限达4.8×10^(-9)mol/L。研究确定此波为1:1铅-抗坏血酸配合物在电极上吸附还原而产生。利用该波测定了尿铅的含量。
A sensitive adsorptive polarographie wave of lead-astor ic acid complex with E_P=-0.62 V (vs.SCE) has been observed by using single-sweep polarography in ethanola-mine-hydrochloric acid buffer solution (pH=9.3) containing 0.3％ ascorbic acid. The peak height is linearly proportional to the lead ocncentration over a range of 9.6×10^(-9)～2.4×10^(-6)mol/L. The detection limit is 4.8×10^(-9)mol/L. This method was applied to the determination of trace amounts of lead in ur ne. The behaviour and mechanism of the polarographic wave have been discussed.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1991年第3期342-345,共4页
Chinese Journal of Analytical Chemistry
关键词
铅
抗坏血酸
吸附波
测定
Lead, Ascorbic acid, Polarographic adsorptive wave
