English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 49074/83178 (59%)
造訪人次 : 6967379      線上人數 : 53
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/25734


    題名: Effects of reactant ion kinetic energy on both endothermic and exothermic ion/molecule reactions in a quadrupole ion trap mass spectrometer
    作者: 吳慧芬;Wu, Hui-Fen;Brodbelt, Jennifer S.
    貢獻者: 淡江大學化學學系
    關鍵詞: Endothermic ion/molecule reactions;Quadrupole ion trap;Kinetic energy
    日期: 1993-05
    上傳時間: 2009-12-01 09:13:40 (UTC+8)
    摘要: The effects of kinetic energy on the outcomes of exothermic and endothermic ion/molecule reactions in a quadrupole ion trap mass spectrometer are examined. Endothermic proton-transfer and charge exchange reactions may be driven in a quadrupole ion trap by acceleration of selected reactant ions to higher kinetic energies, via resonant power absorption from a supplementary a.c. voltage, prior to collisions with neutral substrate molecules. Reactions as endothermic as 1.1 eV for either proton-transfer or charge exchange processes have been promoted, with maximum conversion efficiencies of reactant ions to product ions ranging from 5 to 15% under optimized conditions. Depending on the nature of the reactant ion and its possible reaction pathways, activation of a selected ion may lead to a combination of collisionally-activated dissociation, ion loss from the trap by impingement upon an electrode or ejection, and endothermic ion/molecule reaction. Activation of reactant ions prior to exothermic ion/molecule reactions in the quadrupole ion trap results in decreased reaction efficiency, a result expected for translationally hot ions.
    關聯: Proceedings of the 41th ASMS Conference on Mass Spectrometry and Allied Topics, pp.192a-192b
    顯示於類別:[化學學系暨研究所] 會議論文

    文件中的檔案:

    沒有與此文件相關的檔案.

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋