A hyperbranched anion exchanger obtained by carboxylate surface modified polymer substrate for ion chromatography

IF 3.8 2区化学 Q1 BIOCHEMICAL RESEARCH METHODS

Journal of Chromatography A Pub Date : 2025-02-18 DOI:10.1016/j.chroma.2025.465792

Yufeng Shen, Xiaomei Zhu, Feifang Zhang, Bingcheng Yang

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引用次数: 0

Abstract

A surface-carboxylated polymer substrate-based hyperbranched anion exchanger has been described for ion chromatography (IC). It is prepared by grafting maleic anhydride onto porous polystyrene-divinylbenzene (PS-DVB) microspheres, then hydrolyzed to generate carboxylate groups being anchor points for electrostatic attachment of positively hyperbranched polymer obtained by cyclic reaction of diepoxides and amines. The obtained anion exchanger shows high hydrophilicity and good chromatographic performance, as demonstrated by the separation of common inorganic anions, including polarizable anions, disinfection byproducts and organic acids. High efficiency and good peak shape were achieved, as indicated by the theoretical plate counts of 45,000/m, 51,000/m and asymmetry factors of 1.12, 1.08 for nitrite and bromide, respectively. A desirable feature of such carboxylated groups-based anion exchanger is elimination of possible bleed of sulfate encountered in common sulfonated-based ones, avoiding sulfate blank in the case of the analysis of trace anions in pure water.

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来源期刊

Journal of Chromatography A 化学-分析化学

CiteScore

7.90

自引率

14.60%

发文量

742

审稿时长

45 days

期刊介绍： The Journal of Chromatography A provides a forum for the publication of original research and critical reviews on all aspects of fundamental and applied separation science. The scope of the journal includes chromatography and related techniques, electromigration techniques (e.g. electrophoresis, electrochromatography), hyphenated and other multi-dimensional techniques, sample preparation, and detection methods such as mass spectrometry. Contributions consist mainly of research papers dealing with the theory of separation methods, instrumental developments and analytical and preparative applications of general interest.