title: Hydrothermal carbon nanosphere-based agglomerated anion exchanger for ion chromatography.
abstract: This work reports the application of hydrothermal carbon nanospheres (HCNSs) as stationary phases in ion chromatography. HCNSs were facilely quaternized through polycondensation of methylamine and 1,4-butanediol diglycidyl ether. The quaternization was confirmed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Owing to the electrostatic interaction, quaternized HCNSs were equably attached onto the surface of sulfonated polystyrene-divinylbenzene (PS-DVB) beads to construct the anion exchangers. The aggregation was verified by scanning electron microscopy and elemental analysis. Common anions, aliphatic monocarboxylic acids, polarizable anions, and aromatic acids were well separated on the stationary phases with good stability and symmetry. The prepared column was further applied to detect phosphate content in Cola drink samples. The limit of detection (S/N=3) was 0.09mg/L, and the relative standard deviation (n=10) of retention time was 0.31%. The average recovery was 99.58%.
authors.affiliation: Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China.
authors.forename: Qiming
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: Zhejiang Institute of Geology and Mineral Resources, Hangzhou, 310007 Zhejiang, China.
authors.forename: Shuchao
authors.initials: S
authors.lastname: Wu
authors.affiliation: Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China.
authors.forename: Chaoyan
authors.initials: C
authors.lastname: Lou
authors.affiliation: Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China.
authors.forename: Peiming
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
mesh_terms: D000838:Anions / Q000737:chemistry; D002244:Carbon / Q000737:chemistry*; D002253:Carbonated Beverages / Q000032:analysis; D002852:Chromatography, Ion Exchange; D005504:Food Analysis / Q000379:methods*; D008855:Microscopy, Electron, Scanning; D054118:Nanospheres / Q000737:chemistry* / Q000648:ultrastructure; D010710:Phosphates / Q000032:analysis*; D056951:Photoelectron Spectroscopy
chemical_list: D000838:Anions; D010710:Phosphates; D002244:Carbon
keywords: Hydrothermal carbonization; Ion chromatography; Polarizable anions; Quaternized carbon nanospheres latex-agglomerated stationary phase