A coulometric detector based on carbon felt as working electrode has been d
esigned. Ascorbic acid, hydroquinone, gallic acid and sulfur dioxide were u
sed as electroactive compounds to determine the electrochemical characteris
tics of this detector. Phe coulometric conversion efficiency, selectivity,
linear response range, detection limit and mass transfer coefficient were i
nvestigated in order to use the detector as a cleanup device in a flow inje
ction system with dual-detector. This system has been used for determinatio
n of sulfur dioxide in wine, and the results are compared to those from the
aspiration-oxidation method. (C) 2000 Elsevier Science B.V. All rights res
erved.