Survey of Ochratoxin A in Cereal-based Korean Traditional Foods by HPLC

摘要

Effects of temperature, discoloration, and conditioning on garlic compositions before and after storage were examined. Proximate composition, soluble solids, pH, organic acids, and total sugars of all samples were not significantly different. Sugar c ontents were sucrose > fructose > glucose, and included such fructooligosaccharide as 1-kestose, 1-nystose, and 1-F-fructosyl nystose. Allicin contents in control, green discolored, and conditioned garlics were 647.9, 613.8, and 648.0 mg%, respectively. Thirty-two flavor compounds were identified by GCMSD, including 11 sulfide compounds, 5 acids, and 3 aldehydes. Contents of sulfur compounds, including disulfide(di-propenyl), 2-thiophene methanethiol, thiophene, 3,4 dihydro-3-vinyl-l,2-dithiin, and 2-vi nyl-4H-l,3-dithin, and water-soluble pectins in low temperature-stored garlic were higher than those in control, and decreased by conditioning or inducing green discoloration. These results show sulfur compounds and water-soluble pectins accumulated in l ow temperature stored-garlic, and are then converted into green pigments by alliinase in disintegrated garlic tissues.