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Extraction of ginger rhizome: partition constants and other equilibrium properties in organic solvents and in supercritical carbon dioxide
Author(s) -
SPIRO M.,
KANDIAH M.
Publication year - 1990
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.1990.tb01116.x
Subject(s) - rhizome , supercritical carbon dioxide , oleoresin , chemistry , acetone , dichloromethane , supercritical fluid , supercritical fluid extraction , extraction (chemistry) , solvent , chromatography , gingerol , partition coefficient , carbon dioxide , organic solvent , organic chemistry , botany , chemical engineering , engineering , biology
Summary Equations have been derived for the direct and indirect methods of determining partition constants for constituents extracted from food and other natural materials. A careful distinction is drawn between mass and volume partition constants. The direct method has been applied to the extraction of [6]‐gingerol from Jamaican ginger rhizome with supercritical carbon dioxide and the indirect method to its extraction with acetone, dichloromethane, ethanol and isopropanol. The resulting average mass partition constants were 0.2 9 and 0.3 9 , respectively. The content of [6]‐gingerol in the original ginger rhizome was found to be 31–32μmol g −1 . The extent of oleoresin extraction from the ground ginger and the degree of swelling and organic solvent uptake were also measured.