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题名: Well-defined sulfamethazine-imprinted magnetic nanoparticles via surface-initiated atom transfer radical polymerization for highly selective enrichment of sulfonamides in food samples
作者: Mao, Xuedong1, 2;  Sun, Hongyu1, 2;  He, Xiwen1, 2;  Chen, Langxing1, 2;  Zhang, Yukui1, 2, 3
刊名: ANALYTICAL METHODS
发表日期: 2015
DOI: 10.1039/c5ay00590f
卷: 7, 期:11, 页:4708-4716
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine ;  Technology
类目[WOS]: Chemistry, Analytical ;  Food Science & Technology ;  Spectroscopy
研究领域[WOS]: Chemistry ;  Food Science & Technology ;  Spectroscopy
英文摘要: In this work, a novel kind of core-shell magnetic molecularly imprinted polymer (MIP) for sulfamethazine (SMZ) was synthesized by the surface-initiated atom transfer radical polymerization (ATRP) strategy. In this protocol, polydopamine was formed on the Fe3O4 nanoparticles (NPs) in 10 mM Tris-HCl buffer solution (pH 8.5). The initiator bromide reagent of ATRP was then grafted onto the polydopamine surface. Finally, the MIP layer was formed on the surface of Fe3O4 by the copolymerization of sulfamethazine as a template, methacrylic acid as a functional monomer, and ethylene glycol dimethacrylate as a cross-linking agent using an organometallic catalyst comprising Cu(I) Br and pentamethyldiethylenetriamine. The morphology and magnetic, adsorption and recognition properties of Fe3O4@SMZ-MIP NPs were characterized using transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, vibrating sample magnetometry (VSM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and re-binding experiments. The controllable nature of ATRP allows the growth of a uniform MIP layer with adjustable thickness, providing a large adsorption capacity (680.27 mu g g(-1)), fast kinetics about 40 min to equilibrium, and a considerably high imprinting factor of 17.02. The feasibility of the enrichment of sulfonamides by Fe3O4@SMZ-MIP was demonstrated using egg samples spiked with SMZ and SMR. The recoveries of SMZ and SMR ranged from 76.7 to 93.0% and 69.3 to 77.2%, respectively, and the relative standard deviations (RSD) were <7.0%. In addition, Fe3O4@SMZ-MIP showed good reusability for at least five repeated cycles.
关键词[WOS]: SOLID-PHASE EXTRACTION ;  PERFORMANCE LIQUID-CHROMATOGRAPHY ;  TANDEM MASS-SPECTROMETRY ;  MULTIWALLED CARBON NANOTUBES ;  HPLC DETERMINATION ;  MULTICLASS METHOD ;  POLYMERS ;  MILK ;  SULFAMETHOXAZOLE ;  MICROEXTRACTION
语种: 英语
WOS记录号: WOS:000355557500038
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146302
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Nankai Univ, Coll Chem, Res Ctr Analyt Sci, State Key Lab Med Chem Biol, Tianjin 300071, Peoples R China
2.Collaborat Innovat Ctr Chem Sci & Engn, Tianjin, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Mao, Xuedong,Sun, Hongyu,He, Xiwen,et al. Well-defined sulfamethazine-imprinted magnetic nanoparticles via surface-initiated atom transfer radical polymerization for highly selective enrichment of sulfonamides in food samples[J]. ANALYTICAL METHODS,2015,7(11):4708-4716.
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