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- W2386979753 abstract "Objective To study the extraction technology and effective factors of volatile oil from Heracleum hemsleyanum diels.Methods Compared the orthogonal test design of supercritical CO2 extraction and extracting volatile oil in Heracleum hemsleyanum Diels.assisted by microwave.Results The optimal process conditions for supercritical CO2 extraction were: the pressure of 25 MPa, the temperature at 45℃ and CO2 flowing rate at 20 L/h, under these conditions the yield of volatile oil in Heracleum hemsleyanum Diels reached 0.65%. The optimal process conditions for microwave extraction were: temperature 50℃, microwave radiation time 120 s, power of microwave radiation 600 w, under these conditions the yield of volatile oil in Heracleum hemsleyanum Diels reached 0.72%. The yield was only 0.13% via steam distillation. Conclusion Microwave extraction has the highest yield in the shortest time. But volatile oil in Heracleum hemsleyanum Diels extracted by supercritical CO2 extraction or steam distillation has better quality. Thus the supercritical CO2 extraction is the best way." @default.
- W2386979753 created "2016-06-24" @default.
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- W2386979753 date "2007-01-01" @default.
- W2386979753 modified "2023-09-25" @default.
- W2386979753 title "A Comparative Study on Supercritical CO_2 Extraction and Microwave Extraction of the Volatile Oil in Heracleum hemsleyanum Diels" @default.
- W2386979753 hasPublicationYear "2007" @default.
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