KINETIC-STUDY OF THE ACTION OF HYDROGEN-PEROXIDE ON IODINE IN NEUTRALOR BASIC-MEDIUM - APPLICATION TO IODINE HYDROLYSIS

Authors
KESSIRABIA M GARDESALBERT M JULIEN R FERRADINI C
Citation
M. Kessirabia et al., KINETIC-STUDY OF THE ACTION OF HYDROGEN-PEROXIDE ON IODINE IN NEUTRALOR BASIC-MEDIUM - APPLICATION TO IODINE HYDROLYSIS, Journal de chimie physique et de physico-chimie biologique, 90(4), 1993, pp. 801-814
Citations number
17
Categorie Soggetti
Biology,"Chemistry Physical
Journal title
Journal de chimie physique et de physico-chimie biologique → ACNP
Volume
90
Issue
4
Year of publication
1993
Pages
801 - 814
Database
ISI
SICI code
Abstract
The kinetics of the reduction of iodine by hydrogen peroxide has been studied at pH 7 and 8 using a stopped flow spectrophotometer (millisec ond time scale). The influence of the initial concentrations of iodine , hydrogen peroxide and H+ ions, has been determined by measuring the initial rate of iodine decay. A value of the rate constant of the elem entary step of iodine hydrolysis in the presence of OH- ions has been deduced ( (7.0 +/- 0.5)x10(7) mol-1.1.s-1). The reaction scheme of the hydrogen peroxide initiated iodine reduction and the role of iodine h ydrolysis are discussed.