Chloroform Extraction of Thallium-O, O′-Diethyl Dithiophosphate Complexes

Kenjiro HAYASHI; Yoshiaki SASAKI; Shoji TAGASHIRA; Yoshiko SOMA

doi:10.2116/analsci.2.545

Kenjiro HAYASHI, Yoshiaki SASAKI, Shoji TAGASHIRA, Yoshiko SOMA

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Keywords: Thallium, O,O′-diethyl dithiophosphate, chloroform extraction, stability constant, dimerization constant

JOURNAL FREE ACCESS

1986 Volume 2 Issue 6 Pages 545-548

DOI https://doi.org/10.2116/analsci.2.545

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Abstract

Both uni- and trivalent thallium were extracted into chloroform from the aqueous solution containing O, O′-diethyl dithiophosphate(dtp^-). Thallium(I)-dtp complex in chloroform existed as [TI(dtp)] and its dimer. The stability, distribution and dimerization constants for the thallium(I) complex were determined as 25mol^-1 dm³, 29 and 990mol^-1 dm³, respectively. Thallium(III)-dtp complex was unstable and was reduced to the thallium(I) complex.

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