title: High-capacity anion exchangers based on poly (glycidylmethacrylate-divinylbenzene) microspheres for ion chromatography.
abstract: Poly (glycidylmethacrylate-divinylbenzene) microspheres were prepared by the two-staged swelling and polymerization method and applied to prepare anion exchange stationary phases. Methylamine, dimethylamine, trimethylamine, diethylamine and triethylamine were selected to prepare the quaternary ammonium groups of anion exchangers, respectively. The diameters and surface characteristics of microspheres were measured by scanning electron microscope and nitrogen adsorption-desorption measurements. The anion exchangers were characterized by Fourier transform infrared spectrum, elemental analysis and breakthrough curve methods. The chromatographic performances of anion exchangers were illustrated by separating conventional anions, organic weak acids and carbohydrates. The results indicated that the anion exchange capacities were controllable by changing either the content of glycidylmethacrylate in microspheres or the number of bonded quaternary ammonium layer. Meanwhile, the substituents of quaternary ammonium groups greatly influenced the separation properties of anion exchangers. Finally, the three-layer methylamine-quaternized anion exchanger was successfully applied for the determination of fluoride in tea sample. The content of fluoride was detected to be 0.13mgg(-1) without the interference of acetate and formate.
authors.affiliation: Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China.
authors.forename: Junwei
authors.initials: J
authors.lastname: Liu
authors.affiliation: Institute of Forensic Science and Technology of Nanjing Public Security Bureau, Nanjing 210001, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China.
authors.forename: Heli
authors.initials: H
authors.lastname: Cheng
authors.affiliation: Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China; Department of Medicine, Zhejiang Academy of Traditional Chinese Medicine, Hangzhou 310007, China. Electronic address: wnn8511@163.com.
authors.forename: Nani
authors.initials: N
authors.lastname: Wang
authors.affiliation: Zhejiang Institute of Geology and Mineral Resources, Hangzhou 310007, China.
authors.forename: Shuchao
authors.initials: S
authors.lastname: Wu
authors.affiliation: Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China.
authors.forename: Peimin
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China. Electronic address: zhuyan@zju.edu.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhu
keywords: Anion exchange; High capacity; Poly (glycidylmethacrylate-divinylbenzene); Quaternary ammonium; Stationary phase