SIMULTANEOUS SPECTROPHOTOMETRIC DETERMINATION OF COBALT AND NICKEL WITH THE REACTIVE 2,2'-DIPYRIDILKETONE PICOLINOYLHYDRAZONE

Citation
Mp. Manuelvez et M. Garciavargas, SIMULTANEOUS SPECTROPHOTOMETRIC DETERMINATION OF COBALT AND NICKEL WITH THE REACTIVE 2,2'-DIPYRIDILKETONE PICOLINOYLHYDRAZONE, Afinidad, 50(445), 1993, pp. 150-154
Citations number
11
Categorie Soggetti
Chemistry
Journal title
ISSN journal
00019704
Volume
50
Issue
445
Year of publication
1993
Pages
150 - 154
Database
ISI
SICI code
0001-9704(1993)50:445<150:SSDOCA>2.0.ZU;2-K
Abstract
In aqueous ethanol cobalt(II) and nickel(II) react instantaneously wit h picolinoylhydrazone of 2,2'-dipyridilketone at acetate buffer (pH 4. 9) to form strongly coloured complexes exhibiting absorption maxima at 410 and 385 nm, respectively. This behaviour has been made the basis of a rapid method for the simultaneous determination of these elements . The absorbances of the complexes have been found to be additive for all combinations of these elements in which the individual concentrati ons have been varied from approximately 0.1 to 2.5 ppm. A similar meth od in extract Cl3CH has been studied. Interference data are reported.