Journal
ANALYTICA CHIMICA ACTA
Volume 658, Issue 2, Pages 209-216Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2009.11.008
Keywords
Molecular imprinting; Bisphenol A-imprinted silica nanoparticle; Bisphenol A; Shampoo; Bath lotion; Cosmetic cream
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Funding
- National Natural Science Foundation of China [20777038]
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Highly selective molecularly imprinted layer-coated silica nanoparticles for bisphenol A (BPA) were synthesized by molecular imprinting technique with a sol-gel process on the supporter of silica nanoparticles. The BPA-imprinted silica nanoparticles were characterized by fourier transform infrared spectrometer, transmission electron microscope, dynamic adsorption and static adsorption tests. The equilibrium association constant, K-a, and the apparent maximum number of binding sites, Q(max), were estimated to be 1.25 x 10(5) mL mu mol(-1) and 16.4 mu mol g(-1), respectively. The BPA-imprinted silica nanoparticles solid-phase extraction (SPE) column had higher selectivity for BPA than the commercial C18-SPE column. The results of the study indicated that the prepared BPA-imprinted silica nanoparticles exhibited high adsorption capacity and selectivity, and offered a fast kinetics for the rebinding of BPA. The BPA-imprinted silica nanoparticles were successfully used in SPE to selectively enrich and determine BPA from shampoo, bath lotion and cosmetic cream samples. (C) 2009 Elsevier B.V. All rights reserved.
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