A copper-based chemically modified glassy carbon electrode (GC-Cu) was characterized as an amperometric sensor for the electrochemical detection of several common sulfur-containing compounds in alkaline medium. Under optimised flow injection conditions (i.e., 0.1 M NaOH solution and a constant applied potential of 0.55 V vs. Ag/AgCl), the calibration curves of sulfite, sulfide, thiosulfate, cysteine, cystine, etc. were linear within three order of magnitude The relevant detection limits were of the order of 0.04 - 1.5 mM. A simple and rapid analytical method for determining sulfite in red and white wines by anion-exchange chromatography with electrochemical detection is described
Amperometric detection of sulphur-containing compounds in alcaline medium / I.G. Casella, M. Contursi, E. Desimoni. - In: ANALYST. - ISSN 0003-2654. - 127:5(2002), pp. 647-652.
Amperometric detection of sulphur-containing compounds in alcaline medium
E. DesimoniUltimo
2002
Abstract
A copper-based chemically modified glassy carbon electrode (GC-Cu) was characterized as an amperometric sensor for the electrochemical detection of several common sulfur-containing compounds in alkaline medium. Under optimised flow injection conditions (i.e., 0.1 M NaOH solution and a constant applied potential of 0.55 V vs. Ag/AgCl), the calibration curves of sulfite, sulfide, thiosulfate, cysteine, cystine, etc. were linear within three order of magnitude The relevant detection limits were of the order of 0.04 - 1.5 mM. A simple and rapid analytical method for determining sulfite in red and white wines by anion-exchange chromatography with electrochemical detection is described
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