Citation: CHEN Xia, WEI Yu, LU Jun-Yu, ZHANG Ai-Zhu, YE Fang-Gui, ZHAO Shu-Lin. Preparation and Evaluation of C₁₈ Modified Capillary Open-tubular Column Based on Thiol-ene Click Chemistry for Capillary Electrochromatography[J]. Chinese Journal of Analytical Chemistry, ;2012, 40(10): 1584-1588. doi: 10.3724/SP.J.1096.2012.20329 shu

Preparation and Evaluation of C₁₈ Modified Capillary Open-tubular Column Based on Thiol-ene Click Chemistry for Capillary Electrochromatography

1.
Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Education of China, College of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, China

Corresponding author: YE Fang-Gui,
Received Date: 28 March 2012
Available Online: 7 June 2012
Fund Project: 本文系国家自然科学基金(No.21065002) (No.21065002) 广西自然科学基金(No.2012GXNSFAA053024) (No.2012GXNSFAA053024)广西壮族自治区研究生教育创新计划(No.2011106020703M47)资助 (No.2011106020703M47)

A novel C₁₈ open-tubular column (C₁₈ capillary) for capillary electrochromatography was prepared based on thiol-ene click chemistry between n-octadecanethiol and vinyl-functionalized capillary (Vinyl capillary). The inner wall of capillary was chemically modified with vinyltrimethoxysilane to provide ene-functionality. Then n-octadecanethiol was chemically bonded on surface of Vinyl capillary via thiol-ene click chemistry. The surface features of the prepared C₁₈ capillary were determined using scanning electron microscopy. The effects of buffer pH on the electroosmotic flow (EOF) of C₁₈ capillary, Vinyl capillary and bare capillary were investigated. The experiment results indicated that the lowest EOF profile was obtained on the C₁₈ capillary under the same experimental conditions compared to Vinyl capillary and bare capillary. To evaluate the column performance, test mixture of three polycyclic aromatic hydrocarbons (PAHs) was electrochromatographic separation on the C₁₈ capillary, Vinyl capillary and bare capillary. The electrochromatographic retention behavior of the selected model PAHs on C₁₈ capillary was also investigated. The experiment results showed that C₁₈ capillary exhibited typical reversed phase electrochromatographic behavior toward PAHs. Compared with Vinyl capillary, the relatively good peak shape and no peak tailing were observed for the separation of basic model analytes on C₁₈ capillary, which may be attributed to embedded polar sulphur groups on the surface of the C₁₈ capillary that effectively shielded the adsorption of basic analytes onto the residual silanol groups.
- Capillary electrochromatography,
- C₁₈ capillary,
- Open-tubular column,
- Thiol-ene click chemistry
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沈阳化工大学材料科学与工程学院沈阳 110142

Preparation and Evaluation of C18 Modified Capillary Open-tubular Column Based on Thiol-ene Click Chemistry for Capillary Electrochromatography

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通讯作者: 陈斌, bchen63@163.com

Preparation and Evaluation of C₁₈ Modified Capillary Open-tubular Column Based on Thiol-ene Click Chemistry for Capillary Electrochromatography