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Updated: Feb 1, 2026
09:42
Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
Published on: August 7, 2016
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A new ionic liquid surface-imprinted polymer for selective solid-phase-extraction and determination of sulfonamides
Guifen Zhu1, Guohao Cheng1, Li Wang1,2
1School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Normal University, Xinxiang, Henan, P. R. China.
Journal of Separation Science
|November 30, 2018
Summary
A novel ionic liquid monomer enhances molecularly imprinted polymers for selective sulfonamide adsorption in methanol. This method effectively extracts sulfamethoxazole from environmental samples with high recovery.
Area of Science:
- Polymer Chemistry
- Analytical Chemistry
- Environmental Science
Background:
- Molecularly imprinted polymers (MIPs) show promise for selective adsorption but struggle in polar solvents.
- Developing MIPs with enhanced recognition in methanol is crucial for analyzing sulfonamides.
Purpose of the Study:
- To synthesize a sulfamethoxazole-imprinted polymer using a new ionic liquid functional monomer.
- To evaluate the polymer's selective adsorption performance in methanol.
- To establish a method for trace sulfamethoxazole detection in environmental samples.
Main Methods:
- Synthesis of MIPs using 1-butyl-3-vinylimidazolium bromide monomer.
- Characterization via Fourier transform infrared spectra and scanning electron microscopy.
- Static equilibrium experiments and 1H NMR spectroscopy for mechanism study.
- Solid phase extraction coupled with high-performance liquid chromatography (HPLC).
Main Results:
- The synthesized MIP demonstrated high molecular recognition for sulfonamides in methanol.
- Low adsorption of interferents like diphenylamine and 2,4-dichlorophenol was observed.
- 1H NMR indicated hydrogen bond, electrostatic, and π-π interactions drive recognition.
- A valid MIP-solid phase extraction-HPLC protocol achieved 93-107% recovery for trace sulfamethoxazole in soil and sediment.
Conclusions:
- The ionic liquid functional monomer improved MIP selectivity in polar methanol.
- The developed MIP-based method is effective for trace sulfamethoxazole extraction and detection.
- This approach offers a reliable tool for environmental monitoring of sulfonamides.
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