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GLOBAL YIELDS, CHEMICAL COMPOSITIONS AND ANTIOXIDANT ACTIVITIES OF CLOVE BASIL ( OCIMUM GRATISSIMUM L.) EXTRACTS OBTAINED BY SUPERCRITICAL FLUID EXTRACTION
Author(s) -
LEAL PATRÍCIA F.,
CHAVES F. CÉLIO M.,
MING LIN C.,
PETENATE ADEMIR J.,
MEIRELES M. ANGELA. A.
Publication year - 2006
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.2006.00082.x
Subject(s) - ocimum gratissimum , eugenol , chemistry , flame ionization detector , ocimum , gas chromatography , extraction (chemistry) , supercritical fluid extraction , carotene , supercritical fluid , linolenic acid , methyl eugenol , antioxidant , fertilizer , chromatography , botany , food science , fatty acid , biology , linoleic acid , organic chemistry , pest analysis , tephritidae
ABSTRACT Clove basil ( Ocimum gratissimum ) extracts were obtained with supercritical CO 2 . Clove basil was cultivated using 0, 4, 8 and 12 kg/m 2 of organic fertilizer and was harvested in four seasons: winter, spring, summer and autumn, in the Southern Hemisphere. The extracts' global yields were determined at 40C and 150 bar for samples from all cultivation conditions and harvesting seasons. For selected samples, the extracts' global yields at 40C were determined for pressures of 100, 150, 200, 250 and 300 bar. The extracts were analyzed by gas chromatography–flame ionization detector. Antioxidant activity (AA) was assessed using the coupled reaction of β‐carotene and linolenic acid. The extracts' global yields varied from 0.91 to 1.79% (dry basis), and the AAs varied from 62 to 84% compared with the control β‐carotene. Eugenol and β‐selinene were the major compounds. The relative proportion of eugenol varied from 35 to 60%, while the content of β‐selinene remained approximately constant (11.5–14.1%, area). The other substances quantified in the extracts were 1,8 cineole, trans ‐caryophyllene and α‐selinene.