摘要
以桑色素(Morin)为配位体,研究了Zn(Ⅱ)与其形成的配合物在汞电极上的极谱行为和极谱波的性质,确定了Zn(Ⅱ)-Morin配合物的组成。在pH=4.7的0.1mol·L^-1 HAc—NaAc底液中,Zn(Ⅱ)-Morin配合物在2.0次微分极谱图上产生良好的吸附还原波。其峰电位为-1.14V,峰电流与Zn^2+在7.5×10^-8 ~4.3×10^-6mol·L^-1的浓度范围内呈线性关系,最低检出限为7.5×10^-8mol·L^-1。用于实际样品测定,结果令人满意。
The electrochemical behavior of the complex of Zinc (Ⅱ) with morin was investigated on mercury electrode and Zn(Ⅱ) - morin system was detemined. In 0.1 mol·L^-1 (pH = 4.7) HAc - NaAc medium, the complex was adsorbed on the surface of mercury electrode with a reduction peak at 1.14 V(vs. SCE). Peak current has a linear response in the range of 7.5×10^-8- 4.3 ×10^-6mol·L^-1 for Zn2+ .The detection limit is 7.5 ×10^-8 mol·L^-1.This method has been applied to the determination of Zn^2 + in some sampies and satisfactory results were obtained.
出处
《济南大学学报(自然科学版)》
CAS
2007年第1期41-43,共3页
Journal of University of Jinan(Science and Technology)
基金
山东省教育厅科技计划(J02C07)
关键词
桑色素
锌
配位吸附波
analytical chemistry
morin
Zn(Ⅱ)
complex adsorption wave