Extraction of Co(II) Spectrophotometrically by using Reagent 2-Acetyl Thiophene Thiocyanate

Abstract

2-Acetyl  thiophene thiocyanate (ATT) was proposed as extractant
for development of extractive spectrophotometric method for
determination of Co(II). The reagent coordinates with Co(ll) to
produce yellow coloured complex which was then extracted into
ethyl acetate at pH 10.8-11.2 having absorption maxima at 450 nm.
The thermal study showed that the extraction reactions are exothermic
in nature with the reagent, and the stoichiometric ratio of Co(ll)
to 2-acetyl thiophenethiocynate in organic phase was 1 : 2. The
method permits separation and determination of cobalt from real
and synthetic mixtures. The separation of Co(ll) from bivalent metal
ions has also been studied.