关键词: 铜, 卟啉, 吸附波

Abstract: The sensitive adsorptive complex wave of copper-meso-tetra(4-trime-thylammoniumphenyl)porphyrin(T(4-TMAP)P) complex was studied in detial. The. peak potential of the wave is about-1.24V(vs.SCE) in 1mol/L KOH solution. The detection limit is 2×10^-8mol/L. The peak height is linearly proportional to . the copper concentration over the range of 2×10^-8mol/L to 9×10^-6mol/L. In' the presence of 5 × 10^-3mol/L EDTA and 5×10^-2mol/Ltartrate, at least 100. times that of common cations and anions, except more than 10times that of Pd²⁺. and SeO₃^2-, do not interfere the determination of copper. The method was success-fully applied to the determination of trace amounts of copper in hair, waste water, liver and aluminium alloy samples.The mechanism of the polarographic wave was studied by several electrochemical methods. The composition and conditional stablity constant of Cu(Ⅱ)-T(4-TMAP)P complex were determined by "Polarographically continuous variation method". The results show that the ratio of Cu:T(4-TMAP)P in the complex is 1:1; the conditional stablity constant of complex β' is 7.5 ×10⁷.

Key words: Copper, Porphyrin, PolaroSraphic adsorptive wave