摘要
提出了一个简便测定微量镉的灵敏的示波极谱法，在ｐＨ＝４．０的ＨＡｃ和少量非离子型表面活性剂存在下，Ｃｄ（Ⅱ）产生一灵敏的极谱波，峰电位为－０．６７Ｖ，线性范围为２．０×１０－８ｍｏｌ／Ｌ～４．９×１０－６ｍｏｌ／Ｌ，检出限为５．６×１０－９ｍｏｌ／Ｌ．该法用于废水样及发样的测定。
The single sweep polarographic wave of Cadmium(Ⅱ) was studied. Its peak potential was -0.67V(vs. SCE) under optimum determination conditions of HAc (pH 3.98 ) and 0.0012% TX 100, the changes of peak height with the concentration of Cadmium(Ⅱ) are linear in the range of 2.0×10 -8 --4.9×10 -6 mol/L, and the determination limit is 5.6 ×10 -9 mol/L. The method proposed is applied to the determination of trace Cadmium in the waste water and human hair.
出处
《分析科学学报》
CAS
CSCD
1998年第2期151-153,共3页
Journal of Analytical Science
关键词
镉
示波极谱
表面活性剂
分析
测定
Cadmium, Single sweep polarograph, Surface active agent
