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Supercritical carbon dioxide extraction of okra ( Hibiscus esculentus L) seeds
Author(s) -
András Csaba D,
Simándi Béla,
Örsi Ferenc,
Lambrou Charalambos,
MissopolinouTatala Doukeni,
Panayiotou Costas,
Domokos János,
Doleschall Fruzsina
Publication year - 2005
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2130
Subject(s) - supercritical carbon dioxide , extraction (chemistry) , supercritical fluid extraction , supercritical fluid , chemistry , hexane , chromatography , yield (engineering) , carbon dioxide , solvent , ethanol , organic chemistry , materials science , metallurgy
Pilot‐scale supercritical fluid extraction of okra seeds was carried out, using carbon dioxide as solvent, at temperatures of 40, 50 and 60 °C and pressures of 150, 300 and 450 bar. Laboratory‐scale Soxhlet extraction of the ground seeds was carried out with ethanol and n‐hexane. The yields of supercritical fluid extraction and n‐hexane Soxhlet extractions were similar. The ethanol Soxhlet extraction gave the highest yield, but the concentrations of β‐sitosterol and tocopherols in this extract were lower than in the supercritical fluid extraction product. The fatty acid profiles of the extracts were determined, and a high unsaturated/saturated ratio was observed. The fatty acid compositions were only slightly different for oils obtained by the different extraction methods. Copyright © 2005 Society of Chemical Industry