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Organic Acids Content of the Selected Korean Apple Cultivars  

Do, Young-Sook (Gyeonggi-Do Institute of Health and Environment)
Whang, Hea-Jeung (Department of Food Survice Industry, Cheonan Yonam College)
Ku, Ja-Eel (Department of Food Science and Technology, Chung-Ang University)
Yoon, Kwang-Ro (Department of Food Science and Technology, Chung-Ang University)
Publication Information
Korean Journal of Food Science and Technology / v.37, no.6, 2005 , pp. 922-927 More about this Journal
Abstract
Total and individual organic acid contents of Malus domestica Borkh, cultivars, Tsugaru, Fuji Jonathan (Hong-Ok), and New Jonagold(Sin-Heung) apples, were investigated. Average titratable acidities measured by titration method and total organic acids content determined by HPLC were 241.64-444.52 and 364.23-680.80mg%, respectively. Average total organic acid contents were Jonathan 630.80mg%, New Jonagold 471.04mg%, Fuji 403.80mg%, and Tsugaru 364.23mg%, Contents of DL-malic, citric, fumaric, and quinic acid were 351.98 (Tsugaru)-579.88mg% (Jonathan), 2.14 (Fuji)-12.95mg% (Jonathan), 0.012 (Fuji)-0.060mg% (Jonathan), and 8.91 (Tsugaru)-14.20mg% (Fuji), respectively. Succinic acid was detected only from Jonathan (27.53mg%) and New Jonagold (5.20mg%), while maleic acid was not detected from all cultivars. Ratio of L-malic acid and DL-malic acid contents were 0.98-1.02 in all apple cultivars.
Keywords
organic acid; Korean apple; L-malic acid; organic acids content; apple cultivar;
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