Electrocatalysis and amperometric detection of organic peroxides at modified carbon-paste electrodes.
Cobalt-phthalocyanine modified carbon-paste electrodes are shown to catalyze the electro-oxidation of organic peroxides. Cyclic voltammetry offers useful insights into the catalytic behavior. Such behavior is exploited for developing an effective amperometric detection scheme for butanone peroxide, cumene hydroperoxide and tert-butyl hydroperoxide with optimum response at a potential of +0.70 V (vs. Ag/AgCl). Highly sensitive and stable flow injection measurements, with detection limits of 2.4-8.3 ng and relative standard deviations of 1.7-1.8% (n = 30), are reported. Applicability to measurements in drinking water is illustrated.
Wang
J
J
Department of Chemistry, New Mexico State University, Las Cruces, NM 88003, U.S.A.
Angnes
L
L
Liang
C
C
Evans
O
O