title: Effect of lithium salts addition on the ionic liquid based extraction of essential oil from Farfarae Flos.
abstract: In this study, an ionic liquids (ILs) based extraction approach has been successfully applied to the extraction of essential oil from Farfarae Flos, and the effect of lithium chloride was also investigated. The results indicated that the oil yields can be increased by the ILs, and the extraction time can be reduced significantly (from 4h to 2h), compared with the conventional water distillation. The addition of lithium chloride showed different effect according to the structures of ILs, and the oil yields may be related with the structure of cation, while the chemical compositions of essential oil may be related with the anion. The reduction of extraction time and remarkable higher efficiency (5.41-62.17% improved) by combination of lithium salt and proper ILs supports the suitability of the proposed approach.
authors.affiliation: Modern Research Center for Traditional Chinese Medicine of Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, People's Republic of China. Electronic address: lizhenyu@sxu.eud.cn.
authors.forename: Zhen-Yu
authors.initials: ZY
authors.lastname: Li
authors.affiliation: Modern Research Center for Traditional Chinese Medicine of Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, People's Republic of China; College of Chemistry and Chemical Engineering of Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, People's Republic of China.
authors.forename: Sha-Sha
authors.initials: SS
authors.lastname: Zhang
authors.affiliation: Modern Research Center for Traditional Chinese Medicine of Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, People's Republic of China.
authors.lastname: Jie-Xing
authors.affiliation: Modern Research Center for Traditional Chinese Medicine of Shanxi University, No. 92, Wucheng Road, Taiyuan 030006, Shanxi, People's Republic of China. Electronic address: qinxm@sxu.edu.cn.
authors.forename: Xue-Mei
authors.initials: XM
authors.lastname: Qin
mesh_terms: D004365:Drugs, Chinese Herbal / Q000032:analysis* / Q000737:chemistry; D035264:Flowers; D055772:Green Chemistry Technology / Q000379:methods; D052578:Ionic Liquids / Q000032:analysis* / Q000737:chemistry; D059625:Liquid-Liquid Extraction / Q000379:methods*; D018020:Lithium Compounds / Q000032:analysis* / Q000737:chemistry; D009822:Oils, Volatile / Q000032:analysis* / Q000737:chemistry; D031207:Tussilago
chemical_list: D004365:Drugs, Chinese Herbal; D052578:Ionic Liquids; D018020:Lithium Compounds; D009822:Oils, Volatile
keywords: Chemical composition; Essential oil; Farfarae Flos; Ionic liquids; Lithium salt; Oil yields