期刊
FOOD CHEMISTRY
卷 89, 期 3, 页码 411-420出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2004.02.051
关键词
Phoenix dactylifera; antioxidant activity; phenolic profile; LC-MS
The aim of this study was to determine the phenolic profile of seven different varieties of ripe date palm fruit (Phoenix dactylifera) from Algeria by LC-DAD-MS (ESI+), to investigate their respective antioxidant activities by the DPPH. method and to estimate their phenolic content using the Folin-Ciocalteu method. The total phenolic content was in the range of 2.49 +/- 0.01 to 8.36 +/- 0.60 mg gallic acid equivalents (GAE) per 100 g fresh fruit. This fruit was shown to possess an antioxidant activity, giving values of antiradical efficient (AE) from 0.08 +/- 0.00 to 0.22 +/- 0.00. The phenolic contents and the antiradical efficiencies of the different varieties were highly correlated (R-2 = 0.975). All the varieties were found to contain mainly p-coumaric, ferulic and sinapic acids and some cinnamic acid derivatives. Three different isomers of 5-o-caffeoylshikimic acid were detected. Different types of flavonoids were identified, mainly flavones, flavanones and flavonol glycosides. (C) 2004 Elsevier Ltd. All rights reserved.
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