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Updated: Dec 31, 2025
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Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
Published on: July 14, 2015
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Ionic liquid-copolymerized monolith based porous layer open tubular column for CEC-MS analysis.
Wei Zhou1, Wenqi Sun2, Yikun Liu2
1Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing, 10080, China.
Talanta
|January 2, 2020
Summary
A novel porous layer open tubular (PLOT) capillary electrochromatography (CEC) column was developed using ionic liquid-styrene for enhanced separation efficiency and capacity. This PLOT-CEC column demonstrates excellent performance in CEC-mass spectrometry (CEC-MS) analysis.
Area of Science:
- Analytical Chemistry
- Separation Science
Background:
- Developing capillary electrochromatography (CEC) columns with high separation efficiency and capacity is crucial for advanced analytical techniques.
- Open tubular (OT) columns offer advantages but often require improvements in separation performance and loading capacity.
Purpose of the Study:
- To develop a novel porous layer open tubular (PLOT) column for CEC analysis.
- To enhance separation efficiency and capacity by incorporating an ionic liquid (IL) into the column structure.
- To evaluate the column's performance in CEC-mass spectrometry (CEC-MS) analysis.
Main Methods:
- Co-polymerization of a quaternary ammonium ionic liquid (1-allyl-methylimidazolium chloride, AlMeIm+Cl-) with styrene (IL-styrene) and ethylene dimethacrylate (EDMA) to create the PLOT column.
- Utilized the PLOT-CEC column for CEC-MS analysis of various analytes, including phloroglucinol, parabens, amino acids, and peptides.
- Evaluated separation efficiency (theoretical plates), capacity, repeatability, and stability of the electrospray ionization (ESI) spray.
Main Results:
- The IL-styrene based PLOT-CEC column exhibited a uniform, branch-like structure with a large specific surface area.
- Achieved high separation efficiency, with theoretical plates up to 322,277 N/m for phloroglucinol.
- Demonstrated good performance in CEC-MS analysis of parabens, amino acids, and peptides, characterized by stable separation and ESI spray.
- Obtained good repeatability with relative standard deviations below 4.94% for intra-day, inter-day, and between-tube runs.
Conclusions:
- The developed PLOT-CEC column offers high separation efficiency and capacity, retaining the benefits of OT columns.
- The column's structure and the positively charged ionic liquid contribute to excellent separation performance and stable CEC-MS analysis.
- This novel column is suitable for sensitive and reproducible analysis of diverse analytes in complex matrices.
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