摘要
在０．２ｍｏｌ／ＬＢｒｉｔｏｎ－Ｒｏｂｉｎｓｏｎ（ＢＲ）缓冲体系中（ＰＨ＝８．０），半胱氨酸与镉（Ⅱ）形成的配合物在－０．６２ｖ（ｖｓＳＣＥ）可产生灵敏的阴极化波，其二阶导数波高与镉（Ⅱ）浓度在４．０×１０－８～１．０×１０－６ｍｏｌ／Ｌ范围内成线性关系，检出限为１．０×１０－８ｍｏｌ／Ｌ。研究了配合物波的性质，建立了测定镉（Ⅱ）的新方法，可用于烟草中镉的测定。
A new Polarographic wave caused by cadmiun cysteine complex in 0 20mol/L Britton Robinson buffer solution has been investigated. The peak potential of cathodic wave is about 0 62V(vs SCE). The peak height of the second orderdifferentail wave is linear with cadmium ion concentration over a range of 4 0×10 -8 ～1 0×10 -6 mol/L. The detection limit is 1 0×10 -8 mol/L. The new method has been applied to the determination of cadmium ion in cigarettes. The characteristics of the wave have been studied.
出处
《延安大学学报（自然科学版）》
1998年第3期63-66,共4页
Journal of Yan'an University：Natural Science Edition
基金
陕西省教委专项科研基金
关键词
半胱氨酸
镉
配合物
极谱法
烟草
烟气
Cysteine
Cadmium(Ⅱ)
Polarography
Adsorptive wave
Cigarettes
