Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (12): 2383.

• Articles • Previous Articles     Next Articles

Application of Accurate Mass and Elemental Composition Determination for Pesticides Identification Using a Unit Mass Resolution Gas Chromatography/Mass Spectrometry

  

  • Received:2010-04-07 Revised:2010-10-09 Online:2010-12-10 Published:2010-12-06
  • About author:潘灿平, 男, 博士, 教授, 博士生导师, 主要从事农药残留与环境毒理学的研究. E-mail: canpingp@cau.edu.cn

Abstract: On a unit mass resolution mass spectrometer, such as a single quadrupole MS, allowing for only rough mass confirmation for qualitative analysis. In this study, a novel mass spectral calibration technique, MSIntegnityTM implemented in MassWorksTM, is introduced to externally calibrated using a unique procedure that corrects for both mass axis and mass spectral peak shape to facilitate pesticides identi?cation with high mass accuracy, MS data were acquired in pro?le mode on a unit mass resolution single-quadrupole instrument, even at such a unit mass resolution on a true chromatographic time scale, will now enable the elemental composition determination of unknown ions or ion fragments using a conventional mass spectrometer. This identification capability is further enhanced by a uniquely accurate approach for elemental composition determination through the use of isotope distribution information, CLIPSTM.

Key words: Accurate mass, Elemental composition, MassWorks, Ion fragmentation mechanism, Pesticides.

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