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Reference type: Journal
Authors: Lv YQ, Lin ZX, Feng W, Zhou X, Tan TW
Article Title: Selective recognition and large enrichment of dimethoate from tea leaves by molecularly imprinted polymers.
Publication date: 2007
Journal: Biochemical Engineering Journal
Volume: 36
Issue: (3)
Page numbers: 221-229.
DOI: 10.1016/j.bej.2007.02.023
Alternative URL: http://www.sciencedirect.com/science/article/B6V5N-4N3WYSD-3/2/06cfc7c3980319df8ed94740811891cb

Abstract: Molecularly imprinted polymers (MIPs), using dimethoate as the template molecule, were prepared for selective recognition and large enrichment of dimethoate from tea leaves. Six functional monomers were examined, which showed that MIP prepared by methyl methacrylate (MMA) had the largest imprinting factor of 7.9 for dimethoate. Molecular dynamics (MD) simulations were carried out for the six different molecular systems to investigate the recognition mechanism by predicting the interaction energies, the closest approach distances and the active site groups. The dynamic adsorption property of dimethoate on MMA-based-MIP is demonstrated to accord with the Langmuir isotherm. MIP has a marked selectivity for dimethoate compared to other structurally related organophosphorous pesticides. Molecularly imprinted solid phase extraction (MISPE) has a large selective enrichment factor of approximately 100 for dimethoate from tea leaves. It is a useful tool in the trace detection of environmental engineering
Template and target information: dimethoate
Author keywords: molecular imprinting, solid phase extraction, Dimethoate, Molecular dynamics simulation, adsorption isotherm, Environmental engineering


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