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2013 | 11 | 10 | 1575-1582

Article title

Changes of organic acids and phenolic compounds contents in grapevine berries during their ripening


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Changes of total content of phenolic substances, alteration in total titratable acidity and differences in tartaric acid content in grapes of four white (Müller-Thurgau - MT, Pinot Blanc - Rulandské bílé in Czech, RB, Sauvignon (Sg), and Muscat Ottonel - Muškát Ottonel in Czech, MO) and two blue (Dornfelder - Df and Blue Frankish - Frankovka in Czech, Fr) grapevine varieties throughout their growth, ripening and maturing (July–November). Potentiometric titration was applied for the determination of total titratable acids in grapes (expressed as tartaric acid equivalents in g L−1). A spectrophotometric method according Rebelein based on the formation of a colored complex of ammonium metavanadate and tartaric acid was used for determination of tartaric acid in green juice made by pressing unripe grapes. A spectrophotometric method based on reduction of phosphomolybdato-tungsten complex in alkaline solution using Folin-Ciocalteau reagent was applied for determination of total content of phenolic substances (TCP). [...]










Physical description


1 - 10 - 2013
19 - 7 - 2013


  • Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, 61300, Brno, Czech Republic
  • Department of Chemistry, Faculty of Education, Masaryk University in Brno, 61137, Brno, Czech Republic
  • Department of Chemistry, Faculty of Education, Masaryk University in Brno, 61137, Brno, Czech Republic
  • Department of Food Technology, Faculty of Technology, Tomas Bata University in Zlín, 76272, Zlín, Czech Republic


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