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United States Department of Agriculture

Agricultural Research Service

Title: Supercritical Fluid Extraction of Cedarwood Oil: a Study of Physical Parameters and Chemical Composition

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 10, 1999
Publication Date: N/A

Technical Abstract: The use of supercritcal carbon dioxide (SC-CO2) for the extraction of cedarwood oil (CWO) was investigated, including length of extraction, effects of extraction temperature and pressure, and age of cedarwood chips. In addition, a comparison was made of steam distilled (SD) CWO and SC-CO2-derived CWO. The amount of collected CWO increased with extraction temperature, and to a lesser degree, with extraction pressure. The ratios of the components of the CWO varied only slightly with temperature and pressure. The amount of collected material initially increased with length of extraction and leveled off at ca. 25 minutes. The amount of CWO extracted from cedarwood decreased as the age of the chips increased. This decrease was greatest for the more volatile hydrocarbons, thujopsene and cedrene. The mean weight percent yields of CWO for SD and SC-CO2 extraction were 1.3 and 4.4, respectively. Experienced analytical sensory panelists identified the SC-CO2-extracted CWO as being more similar in odor to the original cedarwood chips than the SD CWO. Collection of residual volatiles from the SC-CO2-extracted chips indicated that they released almost no CWO volatiles compared to unextracted chips.

Last Modified: 4/18/2015
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