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	Fragmentation study and analysis of benzoylurea insecticides and their analogs by liquid chromatography-electrospray ionization-mass spectrometry
	Yang, Xia ; Xia, Yan ; Liao, Xun ; Zuo, Yumin ; Liao, Yiping ; Liu, Huwei
	2006
关键词	LC-ESI-MS benzoylurea fragmentation determination GAS-CHROMATOGRAPHY DIFLUBENZURON PESTICIDES HERBICIDES CONFIRMATION GROUNDWATER RESIDUES APPLES FRUIT
英文摘要	Two insecticides, diflubenzuron and hexaflumuron, and their analogs have been separated by liquid chromatography (LC) and their fragmentation mechanisms were studied by electrospray ionization-ion trap mass spectrometry (ESI-MSn) in both positive- and negative-ion modes. Sequential product ion fragmentation experiments were performed in order to explain the degradation pathways and identify their predominant fragment ions. It was indicated that the characteristic fragmentations are the loss of neutral molecules such as HF, HNO2, and HCl to form stable ring structure or the cleavage of the acyl amine to form conjugated structure. Furthermore, the separation and determination of two benzoylurea (BU) insecticides and their analogs in the water samples from Weiming Lake have been described by LC-ESI-MS in negative mode. By the use of deprotonated molecule for quantitative analysis at low capillary exit voltage, low detection limits, good linearity and reproducibility for standard solutions were presented. (c) 2006 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000239709400015&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Analytical; SCI(E); CPCI-S(ISTP); PubMed; 18
语种	英语
DOI标识	10.1016/j.talanta.2006.01.012
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/197723]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Yang, Xia,Xia, Yan,Liao, Xun,et al. Fragmentation study and analysis of benzoylurea insecticides and their analogs by liquid chromatography-electrospray ionization-mass spectrometry. 2006-01-01.

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