Kamburova M
Department of Chemistry, Higher Institute of Agriculture, 4000 Plovdiv, Bulgaria.
Talanta. 1993 May;40(5):719-23. doi: 10.1016/0039-9140(93)80285-y.
The formation of the acidocomplex of mercury(II) with triphenyl-tetrazolium chloride is studied spectrophotometrically in water-organic media. The composition of the complex is established as TTC:Hg:I = 1:1:1. The molar absorptivity (255) = (6.45 +/- 0.12) x 10(4) 1 mole(-1). cm(-1) is determined. The selectivity of the reaction is studied and the method for determination of mercury(II) 0.1-0.8 mug/ml is shown. Extraction investigations of the system discussed were carried out. The characteristic values for the extraction equilibrium and the equilibrium in the aqueous phase was determined: extraction constant K(ex) = 3.16 x 10(4), distribution constant K(D) = 20.67, and association constant = 1.53 x 10(3). 5 A rapid and sensitive extractive-photometric method for determination of mercury(II) in soil was developed. The determination was carried out without preliminary elimination of mercury.
在水-有机介质中，采用分光光度法研究了汞（II）与氯化三苯基四氮唑形成酸络合物的情况。确定该络合物的组成为TTC:Hg:I = 1:1:1。测定了摩尔吸光系数（255）=（6.45±0.12）×10⁴ 1·mol⁻¹·cm⁻¹。研究了该反应的选择性，并展示了测定0.1 - 0.8μg/ml汞（II）的方法。对所讨论的体系进行了萃取研究。测定了萃取平衡和水相平衡的特征值：萃取常数K（ex）= 3.16×10⁴，分配常数K（D）= 20.67，缔合常数 = 1.53×10³。开发了一种快速灵敏的萃取光度法测定土壤中的汞（II）。该测定无需预先除去汞即可进行。
