VOLTAMMETRIC BEHAVIOR AND SIMULTANEOUS DETERMINATION OF THE ANTIOXIDANTS PROPYL GALLATE, BUTYLATED HYDROXYANISOLE, AND BUTYLATED HYDROXYTOLUENE IN ACIDIC ACETONITRILE-WATER MEDIUM USING PLS CALIBRATION

The voltammetric behavior of propyl gallate (PG), butylated hydroxyani sole (BHA) and butylated hydroxytoluene (BHT) has been studied at the glassy carbon electrode (static and rotating), in an acetonitrile-wate r medium using LS, sampled DC, DP and cyclic voltammetry. The use of a Britton-Robinson buffer (pH 2.8) containing 20% of acetonitrile toget her with the sampled DC mode allows one to analyze binary and ternary mixtures of these antioxidants by applying a PLS type 1 multivariate a pproach. After optimization of the parameters of the chemometric proce dure, the proposed method was validated with synthetic samples and app lied for the determination of these antioxidants in different spilled samples of packet soup.