Journal
NATURAL PRODUCT RESEARCH
Volume 26, Issue 20, Pages 1926-1930Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786419.2011.616506
Keywords
Diplotaenia cachrydifolia; supercritical fluid extraction; Box-Behnken design; essential oil; dillapiole
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Essential oil of Diplotaenia cachrydifolia cultivated in Iran was obtained by supercritical fluid extraction (SFE) method. The oils were analysed by capillary gas chromatography using flame ionisation and mass spectrometric detections. The compounds were identified according to their retention indices and mass spectra (EI, 70 eV). The effects of different parameters, such as pressure, temperature, modifier volume and extraction times (dynamic and static), on the SFE were inspected by a fractional factorial design (2(5-2)) to identify the significant parameters and their interaction. It showed that static and dynamic times had no effect on the extraction. Finally, a Box-Behnken design was applied to obtain the optimum condition of the significant parameters. The optimal condition was obtained as 30.2MPa for pressure, 65.6 degrees C for temperature and 258.4 mu L for modifier volume. The main components that were extracted with SFE were dillapiole (35.1%), limonene (33.5%) and alpha-calacorene (25.5%).
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