As(Ⅲ)-Cu(Ⅱ)协同抑制鲁米诺-MnO_4^-化学发光反应的研究及其应用

Study on the Inhibition Effect of As(Ⅲ)-Cu(Ⅲ)on the Chemiluminescence Reaction of Luminol-MnO

本文报道了As(Ⅲ)-Cu(Ⅲ)两种离子对鲁米诺-MnO_4^-化学发光反应的协同抑制作用,据此拟定了测定微量As(Ⅲ)的化学发光新方法。该法灵敏度较高,检测限为6.8×10^(-9)g/ml As(Ⅲ),选择性也较好,同时线性范围宽(7.0×10^(-9)～3.0×10^(-6)g/ml),测定手续简便。应用本法测定工业废水中的As(Ⅲ),结果满意。

It was found that the chemiluminescence reaction of Luminol--MnO_4^- can be inhibited by As(Ⅲ)-Cu(Ⅱ). Based on this phenomenon, a new chemiluminescence method for the determi- nation of micro arsenic ion has been developed. The method is sensitive and selective with a detection limit of 6.8×10^(-9) g/ml, and a linear range of 7. 0×10^(-9) to 3.0×10^(-6) g/ml. The pro- posed method has been successfully applied to the determination of arsenic ion in industrial waste water samples.