Selective Membrane Sensors for Free Radical Analysis Based on Potentiometric and CHEMFET Devices

L. Campanella; G. Favero; F. Occhionero; M. Tomassetti

doi:doi:10.1051/analusis:1998139

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Volume 26 / No 5 (June 1998)

Analusis, 26 5 (1998) 223-228

Abstract

Free Access

Issue		Analusis Volume 26, Number 5, June 1998 Microcolumn separation techniques developing in Japan


Page(s)		223 - 228
Section		Original articles
DOI		https://doi.org/10.1051/analusis:1998139

Analusis 26, 223-228 (1998)
DOI: 10.1051/analusis:1998139

Selective Membrane Sensors for Free Radical Analysis Based on Potentiometric and CHEMFET Devices

L. Campanella, G. Favero, F. Occhionero and M. Tomassetti

Department of Chemistry, University of Rome "La Sapienza", Piazzale Aldo Moro 5, 00185 Roma, Italy

Abstract
The present paper describes a completely new method for radical determination based on spin trapping reaction suitably adapted for the electrochemical determination of radical species.

First of all benzylidenephenylnitrone was synthesized and then immobilised in a PVC-sebacate membrane. Lastly, this membrane was used to assemble different kinds of selective potentiometric sensors and CHEMFETs. These analytical devices were then used to determine free radical species, principally the anion superoxide radical and, in one case, also the hydroxide radical.