Optimization of SF-CO2 Extraction of Essential Oil from Seeds of Evening Primrose (Oenothera biennis) Grown in West Hunan Province by Response Surface Methodology

doi:10.7506/spkx1002-6630-201002010

FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (2): 42-45.doi: 10.7506/spkx1002-6630-201002010

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Optimization of SF-CO2 Extraction of Essential Oil from Seeds of Evening Primrose (Oenothera biennis) Grown in West Hunan Province by Response Surface Methodology

OUYANG Hui1，YU Ji2，CHEN Xiao-yuan2，ZHANG Yong-kang1

1. Key Laboratory of Plant Resources Conservation and Utilization of Hunan Province, Jishou University, Jishou 416000, China；
2. Institute of Food Science, Jishou University, Jishou 416000, China)

Received:2009-03-25 Revised:2009-08-10 Online:2010-01-15 Published:2010-12-29
Contact: OUYANG Hui1， E-mail:oyhmail@163.com

Abstract

Abstract:

Seeds of evening primrose variety Laer Mountain No. 1 grown in west Hunan province were used as the raw material to extract essential oil in a supercritical fluid supercritical CO2 extraction apparatus. A series of central composite design experiments was conducted for developing a mathematical regression model for oil yield as a response of four variables (namely extractionpressure, extraction temperature, separation temperature, and extraction time). Besides, based on this, response surface and contour plots were drawn for analyzing the interactive effects of the above variables on oil yield. Results indicated that the optimal extraction process was obtained as follows: 39 MPa of extraction pressure, extraction temperature of 43 ℃, separation temperature of 40 ℃, 70 min of extraction time, which resulted in a maximum oil yield of 20.07%.

Key words: evening primrose seed oil, supercritical extraction, response surface analysis

CLC Number:

TS224.4

OUYANG Hui1，YU Ji2，CHEN Xiao-yuan2，ZHANG Yong-kang1. Optimization of SF-CO2 Extraction of Essential Oil from Seeds of Evening Primrose (Oenothera biennis) Grown in West Hunan Province by Response Surface Methodology[J]. FOOD SCIENCE, 2010, 31(2): 42-45.

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Optimization of SF-CO2 Extraction of Essential Oil from Seeds of Evening Primrose (Oenothera biennis) Grown in West Hunan Province by Response Surface Methodology

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