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Target specific sample preparation from aqueous extracts with molecular imprinted polymers.

Stephen E Moring1, Osborne S Wong, John F Stobaugh

  • 1Higuchi Biosciences Center, Center for Bioanalytical Research, 2099 Constant Avenue, Lawrence, KS 66047-3729, USA. smoring@ukans.edu

Journal of Pharmaceutical and Biomedical Analysis
|January 30, 2002
PubMed
Summary

This study presents a new method for creating molecular imprinted polymers (MIPs) for biological sample preparation. These MIPs demonstrate highly selective binding of target molecules, improving purification processes.

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Area of Science:

  • Polymer Chemistry
  • Analytical Chemistry
  • Biomaterials Science

Background:

  • Molecular imprinted polymers (MIPs) are crucial for selective molecular recognition in sample preparation.
  • Developing MIPs for aqueous biological samples presents challenges in achieving high specificity and capacity.

Purpose of the Study:

  • To develop and optimize a synthesis method for molecular imprinted polymers (MIPs) tailored for sample preparation with aqueous biological materials.
  • To evaluate the binding selectivity and capacity of MIPs synthesized with different crosslinkers and functional monomers.

Main Methods:

  • Synthesis of highly cross-linked bulk polymers using acrylamide (ACD) and 4-vinylpyridine (VP) as functional monomers in the presence of 2,6-pyridinedicarboxylic acid (DPA) as the template molecule.
  • Optimization of template complexation by varying temperature, copolymer ratios, and crosslinker types (EGDMA, bisacrylamide, PBMA).

Related Experiment Videos

  • Evaluation of MIP selectivity through chromatographic comparison with structural isomers and analogs, measuring capacity factors and dissociation constants.

    • Main Results:

    • MIPs synthesized with equimolar ACD and VP, and either PBMA or bisacrylamide, exhibited highly selective binding for the DPA template over structurally similar analogs.
    • Maximum binding capacities varied significantly with crosslinker type: 17 micromol/g for EGDMA, 27 micromol/g for PBMA, and 90 micromol/g for bisacrylamide.
    • The study successfully optimized conditions for template complexation, enhancing MIP performance.

    Conclusions:

    • The developed method enables the synthesis of selective molecular imprinted polymers for effective sample preparation of aqueous biological materials.
    • MIPs utilizing PBMA or bisacrylamide crosslinkers demonstrate superior selectivity and capacity for the target molecule, outperforming EGDMA-based MIPs.
    • These findings offer a promising advancement in separation science for biological applications.