title: Development of an ionic liquid-based microwave-assisted method for simultaneous extraction and distillation for determination of proanthocyanidins and essential oil in Cortex cinnamomi.
abstract: Cortex cinnamomi is associated with many health benefits and is used in the food and pharmaceutical industries. In this study, an efficient ionic liquid-based microwave-assisted simultaneous extraction and distillation (ILMSED) technique was used to extract cassia oil and proanthocyanidins from Cortex cinnamomi; these were quantified by gas chromatography/mass spectrometry (GC-MS) and the vanillin-HCl colorimetric method, respectively. 0.5M 1-butyl-3-methylimidazolium bromide ionic liquid was selected as solvent. The optimum parameters of dealing with 20.0 g sample were 230 W microwave irradiation power, 15 min microwave extraction time and 10 liquid-solid ratio. The yields of essential oil and proanthocyanidins were 1.24 ± 0.04% and 4.58 ± 0.21% under the optimum conditions. The composition of the essential oil was analysed by GC-MS. Using the ILMSED method, the energy consumption was reduced and the extraction yields were improved. The proposed method was validated using stability, repeatability, and recovery experiments. The results indicated that the developed ILMSED method provided a good alternative for the extraction of both the essential oil and proanthocyanidins from Cortex cinnamomi.
authors.affiliation: State Engineering Laboratory for Bioresource Eco-Utilization, Northeast Forestry University, 150040 Harbin, China.
authors.forename: Ye
authors.initials: Y
authors.lastname: Liu
authors.forename: Lei
authors.initials: L
authors.lastname: Yang
authors.forename: Yuangang
authors.initials: Y
authors.lastname: Zu
authors.forename: Chunjian
authors.initials: C
authors.lastname: Zhao
authors.forename: Lin
authors.initials: L
authors.lastname: Zhang
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Zhonghua
authors.initials: Z
authors.lastname: Zhang
authors.forename: Wenjie
authors.initials: W
authors.lastname: Wang
mesh_terms: D027424:Cinnamomum / Q000737:chemistry*; D002935:Cinnamomum zeylanicum; D057168:Distillation / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000032:analysis / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry; D052578:Ionic Liquids / Q000737:chemistry; D008872:Microwaves; D009822:Oils, Volatile / Q000032:analysis / Q000302:isolation & purification*; D010938:Plant Oils / Q000032:analysis / Q000302:isolation & purification*; D044945:Proanthocyanidins / Q000032:analysis / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D052578:Ionic Liquids; D009822:Oils, Volatile; D010938:Plant Oils; D044945:Proanthocyanidins; C532132:cinnamomi cortex