title: Partial filling technique in capillary electrophoresis for the separation of phenolic isomers with sulfonatocalix[4]arene as a selector.
abstract: p-Sulfonatocalix[4]arene was used as a selector in capillary electrophoresis to separate phenolic positional isomers. To avoid the detection interference caused by the high UV absorption of calixarene, the partial filling technique was applied. The operation variables, including buffer, separation voltage, the concentration of the selector and the plug length of the selector zone, were systematically optimized. The detection limits of mass were in the range of 0.07-0.28 pg. Molecular modeling was used to explain the interaction between calixarene and phenolic isomers.
authors.affiliation: Department of Chemistry, The State Key Laboratory of Coordination Chemistry, Laboratory of Mesocopic Materials and Chemistry, Nanjing University, Nanjing, PR China.
authors.forename: Hui
authors.initials: H
authors.lastname: Xu
authors.forename: Xiao-Dong
authors.initials: XD
authors.lastname: Yu
authors.forename: Hong-Yuan
authors.initials: HY
authors.lastname: Chen
mesh_terms: D019075:Electrophoresis, Capillary; D004988:Ethers, Cyclic / Q000737:chemistry*; D007536:Isomerism; D008968:Molecular Conformation; D019800:Phenol / Q000737:chemistry*
chemical_list: D004988:Ethers, Cyclic; D019800:Phenol