摘要
本文应用聚氧乙烯型非离子表面活性剂和Cd^(2+)、达旦黄形成三元络合物,使Cd溶出峰降低,从而间接测定非离子表面活性剂的浓度。镉的微分溶出峰电位为-0.65V,测定下限可达1×10^(-11)mol/L。提出了一个灵敏度高的测定环境水中痕量非离子表面活性剂的新方法。
A sensitive method for the indirect determination of trace polyethoxylate non-ionic surfactants has been developed. Since a ternary complex of cadmium is formed in Cd-polyethoxylate non-ionic surfactant-titan yellow system , the stripping peak current (l_p) of cadmium decreases and varies linearly with the concenration of detection of polyethoxylate non-ionic surfactants. The limit of detection was found to be 1×10^(-11) mol/L. Electrodeposition occurred on the surface of glass carbon electrode at -1.2V(vs. SCE). The stripping peak current of cadmium was obtained when the sweep voltage was at -0. 65V (vs. SCE). The conditions of determination,effect of interferences and their eliminations were studied.
出处
《分析试验室》
CAS
CSCD
北大核心
1992年第2期49-51,共3页
Chinese Journal of Analysis Laboratory
关键词
非离子
表面活性剂
伏安法
环境水
Differential anode stripping voltammetry
Non-lonic surfactant determination
