Pyridine-2-acetaldehyde salicyloylhydrazone as reagent for extractive and spec trophotometric determination of cobalt(II) at trace level
2000; CSIR-NIScPR; Volume: 8; Issue: 2 Linguagem: Inglês
ISSN
0975-0991
AutoresShitalkumar Patil, A. D. Sawant, Madam Cama Ran,
Tópico(s)Analytical chemistry methods development
Resumotion. Cobalt(! I) is extracted quantitati ve ly in th e pH ran ge 1.0- 4.0. Th e ye ll ow coloured I :2 metal:li ga nd co mpl ex in chl o roform is determined spec troph otometri ca ll y at 4 15 nm. Beer's law was obeyed over the concentrati on range of 0.5-7.0 J.l g mL- 1 of cobal t(II ). The molar absorptivit y and Sandell sensiti vit y were found to be 1.04 x 10 4 L mo1' 1 cm· 1 an d 5.63 ng cnf~ re spec tiv ely. The meth od is prec ise and simpl e. It was applied for the an alys is of hi gh speed stee ls and pharmace uti ca l sa m ples for th e es timati on of coba lt (II ). Cobalt is industrially ve ry important metal , also it has become increasingly important as constituent of high temperature, hi gh duty steel alloys and super alloys. Th ough it ha s little importance as magnetic material when it is alloyed with iron and nickel it shows exceptional magnetic properties. Biologically it is a significant element playing micronutritive and toxic rol es and env ironmentally pollutant capable of causing health risks even at tra ce levels. Considering versatile applications of cobalt, good and sensitive methods are often required for it s separation and es timation. Various methods have already been reported for determination of cobalt(II) in vario us sa mples by applying so lvent extraction followed by spectrophotometric measurement s. However these methods are time-consuming as they require heating at hi gh temperature
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