Spectrophotometric Determination of Cobalt in Aqueous Solution using Di-2-Pyridyl Ketone ‎Derivatives

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Journal Title, Volume, Page: 
Analytica chimica acta, vol. 259, no1, pp. 175-179
Year of Publication: 
1992
Authors: 
S KHALAF
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
M ALNURI
M ABUDEID
N ZATAR
M HANNOUN
M KHAMIS
Preferred Abstract (Original): 

A method for the spectrophotometric determination of cobalt(II) is presented, with a comparison of the binary complexes formed by cobalt(II) with di-2-pyridyl ketone nicotinoylhydrazone (DPKNH), di-2-pyridyl ketone 2-thiophenoylhydrazone (DPKTH) and di-2-pyridyl ketone benzoylhydrazone (DPKBH) in 50% (v/v) ethanolic solution. Cobalt(II) forms 1: 2 complexes with the three reagents. Maximum absorbance is at 372 nm for Co(II)- DPKNH, at 389 nm for Co(II)-DPKTH and at 370 nm for Co(II)-DPKBH