Extractions and Thermogravimetry Analysis of Magnoliae Flos Volatile Oil
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Abstract:
Flos Magnolia is a traditional Chinese herbal medicine with distinct aroma characteristic, therefore can be used as flavor. Steam distillation extraction (SDE), simultaneous distillation extraction (STDE), ultrasonic assisted extraction (UAE) and supercritical carbon dioxide extraction (SPE CO2) method were used to extract magnolia flos volatile oil (MFVO). Then it was identified and analzed by GC/MS and thermogravimetry (TG). Sixty-one volatile components were found through the four kinds of extractions; main of them were olefins, alcohols, aldehydes, ketones and esters. TG analysis showed that TG curves of SDE, STDE and UAE extracted volatile oils were similar with four weight loss stages, while SPE CO2 extraction of volatile oil appeared three weight loss stages. Different weight loss curves illustrated that the volatile components by different extraction methods were different.
