【摘要】 本文报道了铟-茜素配位剂极谱配位吸附波产生的条件及其电极过程的机理研究.更多还原

【Abstract】 This paper reports the polarographic behavior of indium-alizarin complexone system In a supporting electrolyte containing 3×10^-5 M alizarin complexone, 0.1 M ClCH₂CO₂H-ClCH₂CO₂Na, at pH 2.5, a sensitive adsorptive complex wave of indium-alizarin complexone has been obtained by using single-sweep polarography. The peak potential is -0.66 V （S. C. E）. The change of peak height with the concentration of indium is linear in the range from 1×10^-8 M to 5×10^-6 M. In the solution the composition of the complex has been determined as [X₂InHL]^2- the electrode processes of the adsorptive complex wave may be presented as follows:（1） In the bulk solutionInX₂⁺4-H₃L^-→←[X₂InHL]^2-+2H⁺（2） [X₂InHL]^2- diffuse to electrode surface（3） [X₂nHL]^2-→←[X₂InHL]_ads^2-（4） At E_P1=-0.31V, ligand of the complex is reduced[X₂InHL]_ads^2-+2e+2H⁺→←[X₂InHL’]_ads^2-（5） At E_P2=-0.66V, the center ion of the complex is reduced[X₂InHL’]_ads^2-+3e+2H⁺ E_p3In（Hg）+（H₃L’）_ads^-+2Xwhere L is the alizarin complexone anion, L’ is the corresponding dihydro-alizarin complexone anion, X is ClCH₂Co₂^- or OH^-.更多还原