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    題名: Hydroxide and oxygen atom attachment to dichlorophthalic anhydride in negative chemical ionization and collisionally activated dissociation in an external source ion trap mass spectrometer
    作者: 吳慧芬;Wu, Hui-fen;Chen, Chien-hung
    貢獻者: 淡江大學化學學系
    關鍵詞: negative chemical ionization (NCI);ion trap mass spectrometer (ITMS);collisionally activated dissociation (CAD)
    日期: 2002-08
    上傳時間: 2009-12-01
    出版者: IM Publications
    摘要: This study reports the investigation of some unusual adduct ions of hydroxide and oxygen atoms in both negative-ion chemical ionization (NCI) and collisionally-activated dissociation (CAD) processes in an external-source ion trap mass spectrometer. The [M + OH]– and [M + OH – Cl]– adduct ions in the NCI spectrum of 4,5-dichlorophthalic anhydride are attributed to an ion/molecule reaction due to the presence of trace amounts of water. The formation of the unusual [M + O – Cl]– ions during CAD of the M– ions from 3,6- and 4,5-dichlorophthalic anhydride isomers is attributed to reactive collisions of the fragment ions with residual oxygen.
    關聯: European journal of mass spectrometry 8(4), pp.329-332
    DOI: 10.1255/ejms.489
    顯示於類別:[化學學系暨研究所] 期刊論文

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