title: Establishment and Evaluation of the Novel Tetramethylammonium-L-Hydroxyproline Chiral Ionic Liquid Synergistic System Based on Clindamycin Phosphate for Enantioseparation by Capillary Electrophoresis.
abstract: Much attention has been paid to chiral ionic liquids (ILs) in analytical chemistry, especially its application in capillary electrophoresis (CE) enantioseparation. However, the investigation of chiral ionic liquids synergistic systems based on antibiotic chiral selectors has been reported in only one article. In this work, a novel chiral ionic liquid, tetramethylammonium-L-hydroxyproline (TMA-L-Hyp), was applied for the first time in CE chiral separation to evaluate its potential synergistic effect with clindamycin phosphate (CP) as the chiral selector. As observed, significantly improved separation was obtained in this TMA-L-Hyp/CP synergistic system compared to TMA-L-Hyp or a CP single system. Several primary factors that might influence the separation were investigated, including CP concentration, TMA-L-Hyp concentration, buffer pH, types and concentrations of organic modifier, applied voltage, and capillary temperature. The best results were obtained with a 40 mM borax buffer (pH 7.6) containing 30 mM TMA-L-Hyp, 80 mM CP, and 20% (v/v) methanol, while the applied voltage and temperature were set at 20 kV and 20°C, respectively.
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, P.R. China.
authors.forename: Guangfu
authors.initials: G
authors.lastname: Xu
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, P.R. China.|Key Laboratory of Drug Quality Control and Pharmacovigilance (Ministry of Education), China Pharmaceutical University, Nanjing, P.R. China.|State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, P.R. China.
authors.forename: Yingxiang
authors.initials: Y
authors.lastname: Du
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, P.R. China.
authors.forename: Fan
authors.initials: F
authors.lastname: Du
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, P.R. China.
authors.forename: Jiaquan
authors.initials: J
authors.lastname: Chen
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, P.R. China.
authors.forename: Tao
authors.initials: T
authors.lastname: Yu
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, P.R. China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, P.R. China.
authors.forename: Jinjing
authors.initials: J
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Molecular Engineering, Peking University, Beijing, P.R. China.
authors.forename: Shuaijing
authors.initials: S
authors.lastname: Du
authors.affiliation: Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, P.R. China.
authors.forename: Zijie
authors.initials: Z
authors.lastname: Feng
mesh_terms: D002021:Buffers; D002981:Clindamycin / Q000031:analogs & derivatives* / Q000737:chemistry; D004560:Electricity; D019075:Electrophoresis, Capillary / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D006909:Hydroxyproline / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013237:Stereoisomerism; D013696:Temperature
chemical_list: D002021:Buffers; D052578:Ionic Liquids; D000644:Quaternary Ammonium Compounds; D002981:Clindamycin; C007084:clindamycin phosphate; C027917:tetramethylammonium; D006909:Hydroxyproline
keywords: antibiotics; capillary electrophoresis; enantioseparation; ionic liquids; synergistic effect