摘要
在pH=4．74的0．2mol／LHAc－NaAc缓冲体系中，Cd（Ⅱ）-邻菲咯啉络合物在单扫描示波极谱仪上于-0．79V（vs．SCE）处产生一灵敏的吸附还原波，其二次微分极谐波灵敏度高，波形好。峰电流Ip"与Cd（Ⅱ）浓度在1.5×10－8～6.0×10－6mol／L范围内呈良好的线性关系，其检测下限为1．0×10-8mol／L。该法用于水中微量镉测定，结果较好。
The electrochemical behavior of cadmium (Ⅱ ) -1, 10-phenanthroline complex was investigated in a buffer solution of 0. 2 mol/L HAc-NaAc (pH= 4. 74). The Cd (Ⅱ) -phenanthroline complex produced a reduction peak at-0. 79 V (vs. SCE). Under optimum conditions, the detection limit of Cd (Ⅱ) and the linear range were 1. 0× 10-8 mol/L and 1. 5 ×10-8 ~ 6.0× 10-6 mol/L respectively. This method could be applied to determine trace cadmium in aqueous solution with satisfactory results.
出处
《环境污染与防治》
CAS
CSSCI
CSCD
北大核心
1999年第5期40-42,共3页
Environmental Pollution & Control
