Formation d'un chelate cuivre-vancomycine: application au dosage de l'antibiotique en flux continu et detection amperometrique

Abstract

The formation of a metal-complex of copper(II) with vancomycin, an antibiotic active towards Gram-positive bacteria, has been proved by spectrophotometric, polarographic and potentiometric methods. In particular, the half-wave reduction potentials and voltamperograms indicate the stoichiometry of the addition compound and the equilibrium constant. This complex has been used for determination of vancomycin by a continuous flow method with copper(II) and amperometric detection in a polarographic cell of thin-layer type.