EXTRACTIVE SPECTROPHOTOMETRIC DETERMINATION OF PLATINUM (IV) USING 2-(5- BROMO-2- OXOINDOLIN-3-YLIDENE) HYDRAZINE CARBOTHIOAMIDE AS AN ANALYTICAL REAGENT
Vasant Dnyandeo Barhate* and Parinita Umesh Madan
ABSTRACT
A simple, rapid and sensitive spectrophotometric method has been
developed for the determination of Pt(IV) by using 2-( 5-Bromo -2-
Oxoindolin-3-ylidene)Hydrazine Carbothioamide or 5-BromoIsatin
thiosemicarbazone [HBITSC] as an analytical reagent. [HBITSC] has
been synthesized and characterized by elemental and spectral analysis.
[HBITSC] extracts Pt (IV) quantitatively (99.67%) into n-amyl alcohol
from an aqueous solution of pH range 3.0-6.0 and in the presence of
3cm3 of acetic acid-sodium acetate buffer (pH 4.6). The n-amyl alcohol
extract shows an intense peak at 505 nm (λ max).Beer’s law is obeyed
over the Pt(IV) concentration range of 1.0-9.0 μg/cm3 The Sandell’s
sensitivity and molar absorptivity for Pt -HBITSC system is
23.07ngcm-2 and 8452.53 L mole-1cm-1 respectively. The composition
of extracted species is found to be 1:2 [Pt:HBITSC] by Job’s Continuous Variation and Mole
Ratio Method. Interference by various ions has been studied. The proposed method is rapid,
sensitive, reproducible and has been successfully applied for determination of Pt(IV) in
catalyst samples.
Keywords: Extractive Spectrophotometry, Pt(IV), 5-Bromo Isatin thiosemicarbazone [HBITSC], Samples.
[Download Article]
[Download Certifiate]