Citation: LOU Xuhua, ZUO Huiying, WANG Yuan, ZHAO Wenjie. Preparation and chromatographic evaluation of a polymer-based stationary phase for weak anion-exchange/hydrophilic interaction[J]. Chinese Journal of Chromatography, ;2020, 38(4): 430-437. doi: 10.3724/SP.J.1123.2019.08019 shu

Preparation and chromatographic evaluation of a polymer-based stationary phase for weak anion-exchange/hydrophilic interaction

School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China

Corresponding author: ZHAO Wenjie, wjezh@126.com
Received Date: 20 August 2019

Fund Project: National Natural Science Foundation of China (No. 21675040)

a weak cationic exchange/hydrophilic interaction mixed-mode stationary phase (Sil-PolyCOOH) for high performance liquid chromatography was prepared by bonding polyethylene maleic anhydride to the surface of amino silica gel via a nucleophilic substitution reaction, followed by hydrolysis of the residual maleic anhydride. The new stationary phase material was characterized by solid-state¹³C nuclear magnetic resonance analysis and ζ-potential measurements. The chromatographic performance and retention mechanism of this stationary phase were evaluated using nucleosides and nucleic bases as probes. The effects of mobile phase composition, ion strength, and pH on the retention factor were investigated. The results show that the retention mechanism of the stationary phase involves both hydrophilic distribution interaction and multiple forces between the host and guests. The stationary phase also showed good separation performance for saccharides, diquat, and paraquat. These results show that the stationary phase has a good application prospect in the separation of polar compounds.
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