Citation: JIANG Dan-Dan, SONG Nai-Zhong, WANG Hao, JIA Qiong. Preparation and Application of Magnetic Propyl Gallate Molecularly Imprinted Polymers in Microchip[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(4): 647-653. doi: 10.11895/j.issn.0253-3820.160081 shu

Preparation and Application of Magnetic Propyl Gallate Molecularly Imprinted Polymers in Microchip

1.
¹ College of Chemistry, Jilin University, Changchun 130012, China;
2.
² College of Life Sciences, Jilin University, Changchun 130012, China

Corresponding author: JIA Qiong,
Received Date: 31 January 2016
Available Online: 29 February 2016
Fund Project: 本文系国家自然科学基金(No.21575049) (No.21575049)吉林省科技发展计划项目(No.20140101112JC)资助 (No.20140101112JC)

3-Methacryloxypropyltrimethoxy silane modified Fe₃O₄ was employed as the carrier material to prepare core-shell magnetic molecularly imprinted polymers(Fe₃O₄@SiO₂-MIPS) by using a surface molecular imprinting technology with propyl gallate as the template. The magnetic composites were loaded into a microchip and coupled with high-performance liquid chromatography to separate and preconcentrate synthetic phenolic antioxidants(SPAs). The structures of the resulting complex were characterized by scanning electron microscopy, vibrating sample magnetoeter, thermogravimetric analysis/differential thermal gravity analysis, Fourier-transformed infrared spectroscopy and X-ray diffraction spectrometry. Under the optimal conditions(3 mL of sample solution, sample pH of 5.0, sample flow rate of 0.5 mL/min, and eluent flow rate of 0.3 mL/min), the magnetic MIPS displayed enhanced adsorption ability for phenolic antioxidants. The calibration curves showed good linearity with correlation coefficients greater than 0.9901. Intra-day and inter-day relative standard deviations(RSD) were less than 2.8% and 3.5%, respectively. The present method was applied to the determination of phenolic antioxidants in cosmetics samples, illustrating satisfactory recovery(87.9%-104.0%) and reproducibility(RSD less than 3.7%).
- Microchip,
- Molecularly imprinted,
- Magnetic nanoparticles,
- Phenolic antioxidants
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沈阳化工大学材料科学与工程学院沈阳 110142