Journal
MICROCHIMICA ACTA
Volume 180, Issue 7-8, Pages 545-553Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-013-0962-2
Keywords
Magnetic molecularly imprinted polymers; Organotin; Marine organisms samples; Liquid chromatography-tandem mass spectrometry
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Funding
- Support Program of Nation [2012 BAK08B01]
- Foundation of Nation [30901367]
- Natural Science Foundation of Zhejiang [LY12C20004]
- Analysis Testing Science Technology Project of Zhejiang [2009F70025]
- Natural Science Foundation of Ningbo [2012A610144, 2011A610006]
- Subject Construction Project of Ningbo [XKL11D2104]
- K.C. Wong Megna Fundation of Ningbo University (China)
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We have prepared core-shell magnetic molecularly imprinted polymer nanoparticles for recognition and extraction of tributyl tin (TBT). The use of particles strongly improves the imprinting effect and leads to fast adsorption kinetics and high adsorption capacities. The functional monomer acrylamide was grafted to the surface of Fe3O4 nanospheres in two steps, and MIP layers were then formed on the surface by creating a MIP layer on the surface consisting of poly(ethyleneglycol dimethacrylate) with a TBT template. The particles were characterized in terms of morphological, magnetic, adsorption, and recognition properties. We then have developed a method for the extraction of TBT from spiked mussel (Mytilidae), and its determination by liquid chromatography-tandem mass spectrometry. The method has a limit of detection of 1.0 ng g(-1) (n = 5) of TBT, with a linear response between 5.0 and 1,000 ng g(-1). The proposed method was successfully applied to the determination of trace TBT in marine food samples with recoveries in the range of 78.3-95.6 %.
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