Beltran J L, Centeno G, Izquierdo A, Prat M D
Department of Analytical Chemistry, University of Barcelona, Diagonal 647, 08028 Barcelona, Spain.
Talanta. 1992 Aug;39(8):981-6. doi: 10.1016/0039-9140(92)80282-i.
The dissociation and complex formation equilibria between Ni(II) and Zn(II) with 3-(2-hydroxyphenyl)-2-mercaptopropenoic acid, at 25 degrees in aqueous 0.1 and 1.0M sodium perchlorate solutions, containing about 1% ethanol, have been studied spectrophotometrically. The data were connected directly from the spectrophotometer to an IBM-PC via a serial interface, using the DUMOD program (written in BASIC), described in the paper. The obtained spectra were treated by the factor analysis program NIPALS in order to determine the number of absorbing species and the experimental error. Dissociation constants of ligand (H(3)L), and formation constants for the complexes Ni(HL), Ni(HL)(2), Zn(HL) and Zn(HL)(2) at 0.1 and 1.0M ionic strengths, refined by the SQUAD program, are reported.
在25摄氏度下，于含有约1%乙醇的0.1M和1.0M高氯酸钠水溶液中，通过分光光度法研究了镍（II）和锌（II）与3 - （2 - 羟基苯基） - 2 - 巯基丙酸之间的离解和络合形成平衡。使用本文所述的DUMOD程序（用BASIC编写），通过串行接口将分光光度计直接与IBM - PC相连获取数据。为了确定吸收物种的数量和实验误差，用因子分析程序NIPALS对所得光谱进行处理。报告了通过SQUAD程序在0.1M和1.0M离子强度下精制得到的配体（H₃L）的离解常数以及络合物Ni（HL）、Ni（HL）₂、Zn（HL）和Zn（HL）₂的形成常数。
