Publikace: Voltammetric determination of ascorbic acid in foodstuffs using modified carbon paste electrodes
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Nováková, Marcela
Kalcher, Kurt
Schachl, Klemens
Komersová, Alena
Bartoš, Martin
Vytřas, Karel
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Application of differential pulse cathodic stripping voltammetry for determination of ascorbic acid in foodstuffs have been investigated using a carbon paste electrode modified by cobalt(II) phthalocyanine, which was found to facilitate its oxidation and to decrease the necessary overvoltage. The method showed a good linearity up to 70 ppm of ascorbic acid with a detection limit of 0.8 ppm. When applied to analyse the real samples (fruit juices), the results agreed well with those obtained by traditional titrimetric determination.