Journal
ANALYTICA CHIMICA ACTA
Volume 579, Issue 1, Pages 74-80Publisher
ELSEVIER
DOI: 10.1016/j.aca.2006.07.010
Keywords
organophosphate ester; molecularly imprinted polymer (MIP); charge-transfer; ligand-exchange
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This manuscript describes a method for the selective binding behavior of paraoxan and parathion compounds on surface imprinted polymers which were prepared using both charge transfer (CT) (methacryloyl-antipyrine, MAAP) and ligand-exchange (LE) (methacryloyl-antipyrine-gadalonium, MAAP-Gd) monomers. These polymers were prepared in the presence of azobisisobutyronitrile (AIBN) as an initiator and crosslinking EDMA and were imprinted with organophosphate esters. Influence of CT and LE imprinting on the creation of recognition sites toward paraoxan and parathion was determined applying adsorption isotherms. The effect of initial concentration of paraoxan and parathion, adsorption time and imprinting efficiency on adsorption selectivity for MlP-CT and MIP-LE was investigated. Association constant (K-ass), number of accessible sites (Q(max)) relative selectivity coefficient (k') and binding ability were also evaluated. (c) 2006 Elsevier B.V. All rights reserved.
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