Collect. Czech. Chem. Commun. 1991, 56, 152-156

Reduction of the Ni(II) ion at the dropping mercury electrode from amoxicillin water solution

Milenko R. Ercega, Vera P. Kapetanovićb and Desanka Ž. Sužnjevićc

a Institute of Physical Chemistry, Faculty of Science, University of Belgrade, Belgrade, Yugoslavia
b Institute of Analytical Chemistry, Faculty of Pharmacy, University of Belgrade, Belgrade, Yugoslavia
c Institute of General and Physical Chemistry, 11 000 Belgrade, Yugoslavia


The nature of polarographic precurrents of Ni(II) ion in the presence of amoxicillin as well as the behaviour of amoxicillin in the electrical double layer has been investigated. It has been established the formation of the mono complex of Ni(II) ion with amoxicillin adsorbed at the mercury. The reduction mechanism of the complex has been proposed. Taking into account the effect of the double layer on the kinetics, the rate constant of the heterogenous reaction of the complex formation has been found to be 5.8 · 103 l mol-1 s -1.