Cylindrical carbon fiber microelectrodes (CFMEs) (8 µ in diameter and 8 mm in length) have been used to determine the phenolic antioxidants fert-butylhydroxyanisole (BHA) and ferf-butyUiydroxytoluene (BHT) in acetonitrile medium. The electrochemical behavior of the CFMEs was tested using ferrocene in pure acetonitrile. Pretreatment of the microelectrodes was not necessary for the voltammetric analysis of the antioxidants BHA and BHT. The influence of the supporting electrolyte concentration on ip and Ep values obtained by differential pulse voltammetry (DRV) has been evaluated. Detection limits close to 70 µ L-1 of BHA or BHT were achieved. Squarewave voltammetry (SWV) of these antioxidants at the
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