Premium
Chemical speciation of inorganic and methylarsenic(III) compounds in aqueous solutions
Author(s) -
Hasegawa Hiroshi,
Sohrin Yoshiki,
Matsui Masakazu,
Takeda Noriko,
Ueda Kazumasa
Publication year - 2002
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.318
Subject(s) - chemistry , aqueous solution , hydrochloric acid , genetic algorithm , inorganic chemistry , aqueous two phase system , extraction (chemistry) , reactivity (psychology) , solvent , arsenic , carbon tetrachloride , nuclear chemistry , organic chemistry , medicine , alternative medicine , pathology , evolutionary biology , biology
Speciation of inorganic and methylarsenic(III) species in aqueous hydrochloric acid solutions has been studied by the solvent extraction method. In a hydrochloric acid–carbon tetrachloride system, inorganic and methylarsenic(III) species formed the corresponding chlorides and were extracted into the organic phase. The extractability of inorganic and methylarsenic(III) species increased as the number of methyl groups attached to the arsenic atom increased. In addition, dimerization of dimethylarsinous acid occurred with decreasing acidity in the aqueous phase. On the basis of the data obtained, we determined the stability constants for the proposed species, and evaluated the effect of methyl groups on the speciation and the reactivity of inorganic and methylarsenic(III) species in aqueous solutions. Copyright © 2002 John Wiley & Sons, Ltd.