铬天青S的液/液界面离子转移过程

Ion Transfer of Chromazurol S across the Liquid-Liquid Interface

本文研究了酸性染料显色剂铬天青S的液/液界面离子转移行为。用循环伏安法和电流扫描计时电位法研究了铬天青S在水/硝基苯和水/1,2-二氯乙烷两种界面上的离子转移过程,根据铬天青S在溶液中的离解平衡和电化学性质,讨论了界面离子转移机理,研究了基础电解质和溶剂对铬天青S转移性能的影响,在Britton-Robinson缓冲溶液中测得半波电位Δ_O^Wψ_(1/2)-pH曲线与理论公式相一致,由本法所得离解常数与文献值接近。计算了转移离子的标准转移电位Δ_O^Wψ~O和标准吉布斯转移能Δ_O^WG^O。

The ion transfer of 0hromazural S (CAS) across ~he in%erface of W/NB and W/l, 2- ])CE was sgadied by oyclie vol^amme^ry and ehronopoten^iome^ry wibh linear current scanning. The $ransfer mechanism of GAS was proposed in terms of lis eleo^roohemic^l behavior and equilibria of diasocia^ion. The experimental da^a obtained for half-wave po^eniial AoWT~/~ and pH in W phase are in agreemen~ wi^h ~he ~heoretieal equation based on ~he mechanism proposal. The siandard po^engial differences AoWT~ and standard Gibbs ~ne^gy of Ohromazurol S aoross ~he 'm^erfaee were oaloulat^l.