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Supercritical carbon dioxide extraction of okra (Hibiscus esculentus L) seeds

✍ Scribed by Csaba D András; Béla Simándi; Ferenc Örsi; Charalambos Lambrou; Doukeni Missopolinou-Tatala; Costas Panayiotou; János Domokos; Fruzsina Doleschall

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
177 KB
Volume
85
Category
Article
ISSN
0022-5142

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✦ Synopsis

Abstract

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

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