期刊
MICROCHIMICA ACTA
卷 183, 期 3, 页码 1187-1194出版社
SPRINGER WIEN
DOI: 10.1007/s00604-015-1725-z
关键词
Magnetite nanoparticles; Oleate coating; Miniemulsion polymerization; Copolymerization; Plackett-Burman design; Box-Behnken design; Transmission electron microscopy; Fourier transform infrared spectrometry
资金
- National Natural Science Foundation of China [J1210064, 21277171, 21307155]
- Chinese Universities Scientific Fund [2015LX005]
- Beijing Nova program [YETP0323]
Magnetic polymer nanospheres were prepared and used as adsorbents for the extraction of organochlorine and pyrethroid pesticides from water samples. The adsorbents were synthesized by miniemulsion polymerization of N-vinylimidazole and divinylbenzene and simultaneous encapsulation of oleic acid-coated Fe3O4 nanoparticles. Following desorption with ethyl acetate, the target analytes beta-hexachlorocyclohexane, delta-hexachlorocyclohexane, p,p'-DDE, heptachlor, trans-chlordan, cis-chlordan, bifenthrin, beta-cypermethrin, delta-methrin, lambda-cyhalothrin and esfenvalerate were determined by gas chromatography with electron capture detection. Desorption conditions, extraction times and sample volume were screened by Plackett-Burman design and optimized by Box-Behnken design. Under the optimum conditions, the organochlorines can be quantified in the 20 to 400 ng L-1 concentration range, and the pyrethroids in the 400 to 4000 ng L-1 concentration range. The recoveries of organochlorines and pyrethroids from spiked real water samples are between 77.6 and 97.3 %, with relative standard deviations between 0.9 and 10.0 %. The method for magnetic solid phase extraction described here is fast, simple and friendly to the environment.
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