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Abstract: Bisphenol A molecularly imprinted polymers( BPA-MIPs on silica) were synthesized on the silica gel with bisphenol A as the template molecule,methacrylic acid( MAA) and ethylene glycol dimethacrylate( EDMA) as crossing-linkers. The MIPs were characterized using FTIR specrometry and specific surface area. The adsorption property of the MIPs was tested by static and dynamic adsorption experiments. FTIR spectrum shows the functional group with recognition has generated on the surface of silica gel. The MIPs had good thermostability. The adsorption experiments show the maximum adsorption amount( Q max) is 1. 501 mg/g and the adsorption rate constant is 0. 01586 g /( mg·min). A new rapid and effective sample pretreatment technique,molecularly imprinted solid-phase extraction( MISPE) was achieved by combination of molecular imprinted technology and solid-phase extraction( SPE). The recovery and elution effect of BPA were examined by MISPE and gas chromatography-mass spectrometry( GC-MS). The experimental result shows that the recovery of BPA is nearly 90%. The MIPs were used to test BPA in milk samples,and it had good adsorption selectivity.
Template and target information: bisphenol A, BPA
Author keywords: bisphenol A (BPA), Molecularly-imprinted technology, solid phase extraction, Gas chromatography - mass spectrometry (GC-MS)