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| Optimization of subcritical fluid extraction of Valerian officinalis essential oil and its components analysis |
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| DOI： |
| KeyWord:Valerian officinalis essential oil subcritical fluid extraction uniform design valeraldehyde |
| FundProject:国家林业公益性行业科研专项项目（201404608） |
| Author Name | Affiliation | | TAN Yun1,2,3, WU Hong1,2, LI Jilie3, SHEN Airong1 | 1.Hunan Academy of Forestry, Changsha 410004, China
2.State Key Laboratory of Utilization of
Woody Oil Resource, Changsha 410004, China
3.College of Life Science and Technology,
Central South University of Forestry and Technology, Changsha 410004,China |
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| Abstract: |
| In order to develop an extraction process of Valerian officinalis essential oil with mild extraction conditions and high yield,Valerian officinalis essential oil was extracted by subcritical fluid with Valerian officinalis root as material.The effects of extraction solvent, liquid-solid ratio, extraction time, extraction temperature, extraction pressure and extraction times were investigated by single factor experiment with the yield of Valerian officinalis essential oil as index. Then the process conditions of extracting Valerian officinalis essential oil with subcritical fluid were optimized by uniform design experiment, and the components of Valerian officinalis essential oil were analyzed by GC-MS. The results showed that the optimum conditions for Valerian officinalis essential oil extracted by subcritical fluid were obtained as follows:with butane as extraction solvent, extraction pressure 0.47 MPa, extraction temperature 47 ℃, liquid-solid ratio 11∶ 1, extraction time 25 min and extraction times 4. Under the optimum conditions, the yield of Valerian officinalis essential oil reached (3.383±0.004)%. The total of 57 components were identified in the subcritical butane extracted Valerian officinalis essential oil, and bornyl acetate (29.63%) was the main component. As well as the key pharmacological components valeraldehyde and valerin were detected in Valerian officinalis essential oil,with the relative contents of 2.28% and 0.25%, respectively. In summary, subcritical butane extraction of Valerian officinalis essential oil has potential industrial application value with a high yield and a certain amount of valeraldehyde and valerin contained in the oil. |
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