title: Separation of Berberine Hydrochloride and Tetrahydropalmatine and Their Quantitative Analysis with Thin Layer Chromatography Involved with Ionic Liquids.
abstract: [BMIM]OH was used in mobile and stationary phase of thin layer chromatography (TLC) to analyze berberine hydrochloride and tetrahydropalmatine for the first time. Supported imidazole ionic liquid with hydroxide ion on silica gel (SiO2·Im(+)·OH(-)) was synthesized through simple procedure and characterized by Fourier transform infrared spectroscopy (FT-IR), elemental analysis, and scanning electron microscope (SEM). Moreover, on the plates prepared by SiO2·Im(+)·OH(-), the contents of the above alkaloids in the Chinese patent medicine (CPM) of "Stomacheasy" capsule were successfully determined by TLC scanner. The key conditions and chromatographic behaviors were also investigated in detail. According to similar ways, ionic liquids (ILs) also can be used in other planar chromatographies in two modes. This study is expected to be helpful in expanding the application of IL and its bonded silica gel in TLC separation field.
authors.affiliation: School of Chemical Engineering, Sichuan University, Chengdu 610065, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Lu
authors.affiliation: School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou 510006, China.
authors.forename: Hong-Yan
authors.initials: HY
authors.lastname: Ma
authors.affiliation: School of Chemical Engineering, Sichuan University, Chengdu 610065, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: College of Pharmacy, Jinan University, Guangzhou 510632, China.
authors.forename: Zhi-Guo
authors.initials: ZG
authors.lastname: Ma
authors.affiliation: School of Chemical Engineering, Sichuan University, Chengdu 610065, China.
authors.forename: Shun
authors.initials: S
authors.lastname: Yao