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Int. J. Mol. Sci. 2011, 12(11), 7708-7719; doi:10.3390/ijms12117708

Fatty Acid Composition and Antioxidant Activity of Tea (Camellia sinensis L.) Seed Oil Extracted by Optimized Supercritical Carbon Dioxide

Department of Tea Science, Zhejiang University, Hangzhou 310058, China
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Author to whom correspondence should be addressed.
Received: 17 October 2011 / Revised: 27 October 2011 / Accepted: 30 October 2011 / Published: 8 November 2011
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Abstract

Seeds are another product in addition to leaves (raw materials for teas) of tea (Camellia sinensis L.) plant. The great increase of tea consumption in recent years raises the challenge of finding commercial applications for tea seeds. In the present study, supercritical carbon dioxide (SC-CO2) extraction edible oil from tea seed was carried out, response surface methodology (RSM) was used to optimize processing parameters including time (20–90 min), temperature (35–45 °C) and pressure (50–90 MPa). The fatty acid composition and antioxidant activity of the extracted oil was also investigated. The highest yield of oil (29.2 ± 0.6%) was obtained under optimal SC-CO2 extraction conditions (45 °C, 89.7 min and 32 MPa, respectively), which was significantly higher (p < 0.05) than that (25.3 ± 1.0%) given by Soxhlet extraction. Meanwhile, tea seed oil extracted by SC-CO2 contained approximately 80% unsaturated fatty acids and showed a much stronger scavenging ability on the DPPH radical than that extracted by Soxhlet. SC-CO2 is a promising alternative for efficient extraction of edible oil from tea seed. Moreover, tea seed oil extracted by SC-CO2 is highly edible and has good antioxidant activity, and therefore may play a potential role as a health-promoting food resource in human diets. View Full-Text
Keywords: tea; seed oil; supercritical carbon dioxide (SC-CO2); response surface methodology (RSM); antioxidant activity tea; seed oil; supercritical carbon dioxide (SC-CO2); response surface methodology (RSM); antioxidant activity
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Wang, Y.; Sun, D.; Chen, H.; Qian, L.; Xu, P. Fatty Acid Composition and Antioxidant Activity of Tea (Camellia sinensis L.) Seed Oil Extracted by Optimized Supercritical Carbon Dioxide. Int. J. Mol. Sci. 2011, 12, 7708-7719.

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