Abstract
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 ϵ 255 = (6.45 ± 0.12) × 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 μg/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 × 10 4, distribution constant K D = 20.67, and association constant = 1.53 × 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.
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