Comparing differentiation of xylene isomers by electronic ionization, chemical ionization and self-ion/molecule reactions and the first observation of methyne addition ions for xylene isomers in self-ion/molecule reactions for non-nitrogenated compounds
學年 92
學期 1
出版（發表）日期 2003-10-15
作品名稱 Comparing differentiation of xylene isomers by electronic ionization, chemical ionization and self-ion/molecule reactions and the first observation of methyne addition ions for xylene isomers in self-ion/molecule reactions for non-nitrogenated compounds
作品名稱（其他語言）
著者 吳慧芬; Wu, Hui-fen; Wu, Wen-feng
單位 淡江大學化學學系
出版者 John Wiley & Sons
著錄名稱、卷期、頁數 Rapid Communications in Mass Spectrometry 17(21), pp.2399-2406
摘要 This study presents the self-ion/molecule reaction (SIMR) spectra of three xylene isomers, and proposes an approach to differentiating them based on observed differences in relative abundances of ions formed by SIMR in an internal source ion trap instrument. It also demonstrates the applicability of SIMR for isomer discrimination, which is better than electron ionization (EI) and dimethyl ether chemical ionization (DME CI) in an ion trap mass spectrometer (ITMS) since no CI reagent, metal ions or internal standards are required to perform SIMR. The merits of the new method for distinguishing isomers are that it is simple, rapid and economic. To date, methyne addition products ([M+13]+ ions) have been observed for several nitrogenated compounds including aza-crown ethers, aniline and dopamine from SIMR in the ITMS. The xylene isomers are, however, the first three non-nitrogenated compounds that have been shown to produce the methyne addition ions in SIMR.
關鍵字
語言 en
ISSN 0951-4198
期刊性質 國內
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產學合作
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審稿制度 否
國別 TWN
公開徵稿
出版型式 ,電子版
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