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Olgun F. A. O., Özyurt D., Berker Çetin K. I., Demirata B., Apak R.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, vol.94, no.12, pp.2401-2408, 2014 (SCI-Expanded)
Article / Article
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
Science Citation Index Expanded (SCI-EXPANDED), Scopus
ascorbic acid assay, spectrophotometry, modified Folin-Ciocalteu method, La(III) chelate extraction, polyphenol removal, DIFFERENTIAL PULSE POLAROGRAPHY, FLUOROMETRIC-DETERMINATION, DEHYDROASCORBIC ACIDS, LIQUID-CHROMATOGRAPHY, VEGETABLES, FRUITS, ANTIOXIDANTS, ELECTRODE, REAGENT, PLASMA
Istanbul University Affiliated:
BACKGROUND: This study proposes modifications to the conventional Folin-Ciocalteu (FC) spectrophotometric method for individually determining ascorbic acid (AA) in complex matrices in the presence of other phenolics and potential interferents. The conventional FC assay in the aqueous phase, which normally measures total water-soluble phenolics and other antioxidants, has recently been modified by incorporating isobutanol (iso-BuOH) in the solvent mixture for the simultaneous determination of lipophilic and hydrophilic antioxidants in foods.