Determination of Free and Conjugated Quercetin in Moravian Red Wines
E. Dadakova
Department of Chemistry, Faculty of Agriculture, University of South Bohemia, Ceske Budejovice,
N. Vrchotova
Institute of Landscape Ecology, Academy od Science of the Czech Republic, Ceske Budejovice,
J. Triska
Institute of Landscape Ecology, Academy od Science of the Czech Republic, Ceske Budejovice,
M. Kyselakova
Department of Postharvest Technology of Horticultural Products, Faculty of Horticulture, Mendel University of Agriculture and Forestry in Brno, Lednice
Abstrakt
Free and conjugated quercetin in Moravian red wines were determined after acid hydrolysis. The measured concentrations are in agreement with most published data in the literature. The comparison of the vintage years 2000 and 2001 revealed increased concentrations of both quercetin types in 2000, which could be a consequence of a longer sunshine period in that year.
