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	Analysis of Organophosphorus Pesticides by Solid Phase Extraction Using Multi-walled Carbon Nanotubes as Adsorbent
	Zhao Hai-Xiang ; Shi Wen-Li ; Sun Da-Jiang ; Wang Hua ; Zhang Lian-Peng ; Zao Meng-Bin ; Ding Ming-Yu
	2010-10-12 ; 2010-10-12 ; OCT
关键词	Multi-walled carbon nanotubes solid phase extraction organophosphorus pesticides vegetables gas chromatography-flame photometric detector PERFORMANCE LIQUID-CHROMATOGRAPHY MASS-SPECTROMETRY PRECONCENTRATION PORK Chemistry, Analytical
中文摘要	A multi-residue analytical method based on solid phase extraction with multi-walled carbon nanotubes(MWCNTs) as adsorbent was developed. The determination of 16 organophosphorus pesticides(methamidaphos, mevinphos, phorate, diazinon, monocrotophos, dimethoate, chlorpyrifos-methyl, pirimiphos-methyl ester, chlorpyrifos, fenthion, isocarbophos, quintiofos, Methidathion, ethion, phosalone, phthalophos) in vegetables(including cucumber, grape tomato, cabbage, leek, ginger and onion) was carried out by gas chromatography-flame photometric detector (GC/FPD). Two columns (HP-50 for the analysis and HP-1 for the validation) and two FPD detectors were used in this method. The clean-up conditions that included pretreatment of MWCNTs SPE, re-dissolved solvent, and eluted solvent were optimized. The experimental results showed the MWCNTs SPE cartridge can adsorb the coloring background and the eluent was colorless. Two clean-up methods were developed. For the water phase clean-up method, the extracts were re-dissolved by 5 ml, pH 5.0 HAc-NaAc buffer, dried 10 min under vacuum, the analyte were eluted by 10 mL dichlorme-thane, the recoveries of 9 organophosphorus pesticides were over 75%, and RSD were under 9%. For the organic phase clean-up method, the extracts were re-dissolved in 2 ml, hexane, and then eluted with acetone-hexane(5:5, V/V). The recoveries were over 75% and RSD were under 11.7% for 16 organophosphorus pesticides. This study indicated the MWCNTs SPE cartridge was efficient clean-up method to vegetable(included sulfur-containing Vegetables) because it reduced the contamination of the coloring background to GC/FPD.
语种	中文 ; 中文
出版者	ELSEVIER SCIENCE INC ; NEW YORK ; 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/80773]
专题	清华大学
推荐引用方式 GB/T 7714	Zhao Hai-Xiang,Shi Wen-Li,Sun Da-Jiang,et al. Analysis of Organophosphorus Pesticides by Solid Phase Extraction Using Multi-walled Carbon Nanotubes as Adsorbent[J],2010, 2010, OCT.
APA	Zhao Hai-Xiang.,Shi Wen-Li.,Sun Da-Jiang.,Wang Hua.,Zhang Lian-Peng.,...&Ding Ming-Yu.(2010).Analysis of Organophosphorus Pesticides by Solid Phase Extraction Using Multi-walled Carbon Nanotubes as Adsorbent..
MLA	Zhao Hai-Xiang,et al."Analysis of Organophosphorus Pesticides by Solid Phase Extraction Using Multi-walled Carbon Nanotubes as Adsorbent".(2010).

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