Citation: ZHAO Xingyun, ZHANG Hongyan, ZHOU Xiaoyu, WANG Li, WAN Lihong, WU Ren'an. Preparation of core-shell silica-carbon composite microspheres stationary phase and application in saccharide separation[J]. Chinese Journal of Chromatography, ;2020, 38(12): 1357-1362. doi: 10.3724/SP.J.1123.2020.08016 shu

Preparation of core-shell silica-carbon composite microspheres stationary phase and application in saccharide separation

ZHAO Xingyun ^1,2 ,
ZHANG Hongyan ¹ ,
ZHOU Xiaoyu ^1,2 ,
WANG Li ¹ ,
WAN Lihong ¹ ,
WU Ren'an ^1,,

1.
Laboratory of High-Resolution Mass Spectrometry Technologies, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
2.
the University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: WU Ren'an, wurenan@dicp.ac.cn
Received Date: 28 August 2020

Fund Project: National Natural Science Foundation of China (Nos. 21675156, 21974138).

In this study, core-shell mesoporous silica-carbon composite microspheres (Sil@MC) were prepared by one-step coating of the phenol formaldehyde polymer (PF) on SiO₂ surface and by carbonizing the PF polymer under nitrogen atmosphere. The morphology observation of the Sil@MC stationary phase showed that it had good monodispersity. Surface area (302 m²/g), mean pore diameter (9.5 nm), and pore volume (0.63 cm³/g) of Sil@MC materials were also measured by pore structure analysis. The results showed that the Sil@MC was successfully immobilized on the silica particles via copolymerization and carbonization. As a stationary phase of HPLC, the Sil@MC column was filled by a slurry method. The Sil@MC materials formed after calcination of SiO₂ coated with phenolic resin could be used for the separation of four polar sugar compounds (D-(+)-glucosamine hydrochloride, glucose, D-(+)-trehalose dihydrat and raffinose) with the mobile phase of acetonitrile-water (containing 0.1% (v/v) formic acid). However, the material formed by calcinating SiO₂ without coating phenolic resin could not separate these polar sugar compounds by HPLC-MS. Finally, the representative oligosaccharide isomers of raffinose, melezitose and stachyose, nystose, and human milk oligosaccharide isomers, such as 3'-sialyllactose, 6'-sialyllactose and lacto-N-newtetraose, lacto-N-tetraose, were successfully separated by the Sil@MC column with good peak shapes. The results demonstrates that silica-carbon composites derived from phenolic resin have potential application in polar compounds chromatographic separation.
- high performance liquid chromatography-mass spectrometry (HPLC-MS),
- stationary phase,
- saccharide separation,
- nanoporous carbon materials
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