Comparison of Components in the Volatile Oil Extracted from Cortex Moutan by Five Methods
Article
Figures
Metrics
Preview PDF
Reference
Related
Cited by
Materials
Abstract:
In this study, a gas chromatography-mass spectrometry (GC-MS) combined with retention index (RI) method was developed for the analysis of volatile oil extracted from cortex moutan by the following five extraction methods: water distillation, steam distillation, steam-alcohol lamp heating distillation, ether ultrasonic extraction, and supercritical CO2 extraction. The best method was selected through comparing the yield of the volatile oil, composition and extraction rate of paeonol. The oil yields obtained by the five methods were 1.03%, 2.97%, 4.45%, 2.85%, and 0.63%, respectively, with the types of extracted compounds as 21, 22, 22, 23, and 22, respectively (mainly phenols, alkanes, acids, esters, ketones, alcohols and aldehydes). The contents of paeonol obtained by the five methods were 76.34%, 72.49%, 91.54%, 60.04% and 75.9%, respectively. Taking the oil yield and paeonol extraction rate as the indices, the steam-alcohol lamp heating distillation method resulted in the highest extraction rate of volatile oil from cortex moutan, which could be used for the extraction of volatile oil from cortex moutan. Taking the extracted compounds as indices, a more comprehensive profile of the identified components was obtained by the supercritical CO2 extraction and the ether ultrasonic extraction.
