期刊
FOOD CHEMISTRY
卷 130, 期 1, 页码 203-208出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2011.07.007
关键词
Supercritical extraction; Mangosteen; Antioxidant activity; Response surface methodology; Xanthones; UV-Vis spectra
资金
- Council of Scientific and Industrial Research, India
Xanthones are an important class of secondary metabolites present in mangosteen fruit pericarp. Herein we have used supercritical fluid technology to extract the active constituents from mangosteen pericarp. Ethanol was added (5% w/w) as a co-solvent to increase the polarity of the CO(2), thus favouring the extraction of xanthones. The maximum extraction yield of 15 wt.% was achieved at a pressure of 280 bar, temperature of 50 degrees C and a time of 8 h, while without co-solvent the yield was 7.5 wt.%. Conditions for antioxidant activity as measured by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical-scavenging assay was 280 bar at 50 degrees C and 5 h. Box-Behnken design was used to study the efficiency of extraction pressure (180, 280, and 380 bar), temperature (40, 50, and 60 degrees C) and time (2-8 h) on the total extraction yields and their radical scavenging activity. Experimental results of the total extract yield and radical scavenging activity were close to the predicted values calculated from the polynomial response surface models equations (R(2) = 0.99 and 0.98). (C) 2011 Elsevier Ltd. All rights reserved.
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