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Abstract: Objective To demonstrate the mechanism of molecularly imprinted polymer of maleic hydrazide (MH) and evaluate the adsorptive specificity and selectivity. Methods MH imprinted polymer was prepared by hot-induced polymerization in methanol. MH, methacrylic acid (MAA), ethylene glycol dimethacrylate (EGDMA), and azobisisobutyronitrile (AIBN) were used as template, functional monomer, cross-linker, and initiator respectively. Ultraviolet spectra were used to demonstrate the mechanism of the interaction between MH and MAA in methanol. Results One MH was entrapped by two MAAs in methanol through hydrogen bond. Langmuir model was used to fit the adsorption data. Molecularly imprinted polymers showed specific binding sites to MH. B_(max) of MH imprinted polymer (546.35 μmol g-1) was significantly higher than that of blank molecularly imprinted polymer (1.42 μmol g-1). Conclusion The imprinted polymers can be used for separation, enrichment, and analysis of trace maleic hydrazide residue in plants especially for the solid phase extraction of trace maleic hydrazide residue from samples before detection.
Template and target information: maleic hydrazide, MH
Author keywords: pesticides, Maleic hydrazide, molecular imprinting, recognition mechanism and characteristic