Please use this identifier to cite or link to this item:
Type: Artigo de periódico
Title: Brazilian Ginseng extraction via LPSE and SFE: Global yields, extraction kinetics, chemical composition and antioxidant activity
Author: Leal, PF
Kfouri, MB
Alexandre, FC
Fagundes, FHR
Prado, JM
Toyama, MH
Meireles, MAA
Abstract: Brazilian Ginseng extracts of two species, Pfaffia paniculata and Pfaffia glomerata, were obtained by supercritical fluid extraction (SFE) with CO(2) and by low-pressure solvent extraction (LPSE) with methanol, hexane and ethanol. The SFE assays were conducted at pressures of 100, 200 and 300 bar, and temperatures of 30 and 50 degrees C. The qualitative chemical compositions of the extracts were determined by thin layer chromatography (TLC). One of the active principles of interest from P. glomerata extract, beta-ecdysone, was identified and quantified by HPLC. The antioxidant activities of Brazilian Ginseng extracts were determined by the coupled reaction of linolenic acid and beta-carotene. For P. paniculata, the highest SFE yield was obtained at 200 bar/50 degrees C (0.22%, dry basis d.b.), while the best extraction condition for P. glomerata was obtained at 200 bar/30 degrees C (0.18%, d.b.). The higher extract yields obtained by LPSE were 2.0% and 5.8% (w/w, d.b.) for P. paniculata and P. glomerata, respectively, both obtained with methanol as extraction solvent. From the overall extraction curve of P. glomerata, it was possible to obtain the kinetic parameters of extraction; the duration of the CER (constant extraction rate) period was determined as 134 min. The TLC plates showed the possible presence of flavonoids in the ethanolic extract for both Pfaffia species. The antioxidant activity analysis detected that LPSE extracts had higher activity than SFE extracts. (C) 2010 Elsevier B.V. All rights reserved.
Subject: Antioxidant activity
Brazilian Ginseng
Pfaffia glomerata
Pfaffia paniculata
Supercritical fluid extraction
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.supflu.2010.03.007
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOS000279364700006.pdf484.06 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.