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United States Department of Agriculture

Agricultural Research Service

Title: Carbon Dioxide Extraction of Eastern Red Cedar: Liquid and Supercritical Extraction

item Eller, Fred
item King, Jerry

Submitted to: Annual Meeting and Expo of the American Oil Chemists' Society
Publication Type: Abstract Only
Publication Acceptance Date: May 16, 2001
Publication Date: N/A

Technical Abstract: The use of carbon dioxide, both liquid and supercritical, was investigated for the extraction of cedarwood oil and juniper leaf oil. Cedarwood oil was effectively extracted by carbon dioxide at pressures as low as 1,500 psi and 25 C. Higher pressures (up to 6,000 psi) or temperatures (up to 100 C) resulted in only minor increases in cedarwood oil yield. However, the rate of extraction increased as the extraction pressure increased. Gas chromatographic analyses of fractions collected during the course of the extraction indicated that the hydrocarbons, cedrene and thujopsene, were more rapidly extracted than the alcohols, cedrol and widdrol. The use of carbon dioxide for the extraction of leaf oil also produced excellent yields. Mass spectral analysis indicated that the leaf oil contained sabinene and limonene as major constituents.

Last Modified: 4/22/2015
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