Production of Eucalyptus cinerea Essential Oils Produced by hydrodistillation and supercritical carbon dioxide extraction techniques:A comparative study.

Mann, T S and G D, Kiran Babu and Guleria, S and Singh , Bikram (2011) Production of Eucalyptus cinerea Essential Oils Produced by hydrodistillation and supercritical carbon dioxide extraction techniques:A comparative study. Natural Product Communications, 6 (1). pp. 107-110.

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Abstract

The essential oil of Eucalyptus cinerea is reported to possess a higher 1,8-cineole content than other Eucalyptus species. Variations in the quantitative and qualitative characteristics of E. cinerea oil produced by hydrodistillation (HD) and supercritical carbon dioxide extraction (SCE) techniques and a comparison between glycoside-bound and free volatile constituents produced by HD have been studied. It was found that HD produced higher oil (free volatiles) content (3.1%) as compared with SCE (1.1%), whereas bound volatiles constituted only about 0.4%. Gas chromatographic (GC) analysis of the oil samples revealed significant difference in their chemical composition. The essential oil (free volatiles) produced by HD contained 1,8-cineole (85.1%) as the major constituent, followed by alpha-terpineol (7.2%) and limonene (4.4%). In the bound volatile fraction produced by HD, 1,8 cineole (20.6%), alpha-terpineol (7.6%), p-cymene (6.3%), and limonene (4.5%) were found as major constituents. The extract produced by SCE was dominated by 1,8-cineole (70.4%), alpha-terpineol (8.6%), globulol (3.1%), aromadendrene (2%), citronella! (1.7%), viridiflorol (1.3%), phytol (1.1%) and terpinen-4-ol (1%). Although HD produced higher oil yields, SCE produced better extract in terms of the number of components detected.

Item Type:	Article
Uncontrolled Keywords:	Eucalyptus cinerea; volatile oil; supercritical carbon dioxide extraction; hydrodistillation; glycoside-bound volatiles; chemical composition; 1,8-cineole; alpha-terpineol, CHEMICAL-COMPOSITION; FLUID EXTRACTION; ANTIOXIDANT ACTIVITY; LEAF OILS; 1,8-CINEOLE; ANTIFUNGAL; TEA
Subjects:	Natural Product Chemistry
Divisions:	UNSPECIFIED
Depositing User:	Dr. Aparna Maitra Pati
Date Deposited:	29 Dec 2011 10:10
Last Modified:	08 Feb 2012 11:04
URI:	http://ihbt.csircentral.net/id/eprint/645

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