锌(Ⅱ)-四(4-甲氧基-3-磺酸苯基)卟啉的吸附伏安法研究  

Adsorptive Voltammetric Study of Zinc-Tetra (4-methoxy-3-sulfophenyl) Porphyrin Complex

作　　者：施清照[1] 张咏红[1] 

机构地区：[1]杭州大学化学系,杭州310028

出　　处：《分析试验室》1992年第4期3-5,9,共4页Chinese Journal of Analysis Laboratory

基　　金：省教委资助项目

摘　　要：在NH_3-NH_4Cl(pH=11)的介质中Zn(Ⅱ)-四(4-甲氧基-3-磺酸苯基)卟啉配合物在-1.30V(vs.SCE)出现一灵敏的吸附还原峰。峰高与Zn(Ⅱ)浓度在一定范围内有良好的线性关系,检测下限达5.5×10^(-9)mol/L(富集2min)。本文详细地研究了测定Zn(Ⅱ)的最佳条件,初步探讨了配合物在悬汞电极上的伏安行为。方法灵敏度高,选择性好。用于高炉煤气洗涤污水中微量锌的测定,结果令人满意。In NH_3-NH_4Cl buffer solution (pH 11.0),a sensitive adsorptive complex wave of zinc-tetra (4-methoxy-3-sulfophenyl) porphyrin has been obtained using linear sweep voltammetry. The peak potential of the wave is about—1.30v (vs. SCE). The linear relationship holds between the peak height and zinc concentration over the range of 1.54×10^(-8)～1.38×10^(-6)mol/L. The detection limit is 5.5×10^(-9)mol/L. The optimal conditions for the determination of zinc have been discussed in detail. The behaviour of voltammetry for adsorptive complex on HMDE was explored. The method has been applied to the determination of zinc in polluted water of gaswashing in blast furnace and the analytical results conform to those by atomic absorption spectrometry.

关 键 词：锌 吸附伏安法 卟啉 

分 类 号：O614.241[理学—无机化学]