English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 56738/90513 (63%)
造访人次 : 12089219      在线人数 : 134
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜寻范围 查询小技巧:
  • 您可在西文检索词汇前后加上"双引号",以获取较精准的检索结果
  • 若欲以作者姓名搜寻,建议至进阶搜寻限定作者字段,可获得较完整数据
  • 进阶搜寻

    jsp.display-item.identifier=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/987654321/95028

    题名: Characterization of Uracil Compouds and Their Derivatives by Negative Ion Analysis in an Ion Trap Tandem Mass Spectrometer
    作者: 吳慧芬;鍾淼鈞
    贡献者: 淡江大學化學學系
    关键词: 離子阱串聯質譜儀;負離子分析;尿嘧啶化合物;碰撞誘導分解;Ion Trap Tandem Mass Spectrometer;Negative Ion Analysis;Uracil Compound;Collisionally Activated Dissociation
    日期: 1999-05
    上传时间: 2014-02-09 07:37:46 (UTC+8)
    摘要: Traditional ion trap mass spectrometry which utilize internal ionization could not perform negative ion analysis. However, since 1996, the first commercial ion trap mass spectrometer with an external ionization source(Finnigan GCQ) allows operating at higher pressure for the source region and also a modification detector with the changeable dynode (.plmin.15KV). Therefore, it can be applied to perform negative ion analysis. In our hands, we first applied this benchtop ion trap to characterize an array of uracil compounds and their derivatives by negative ion analysis. Methane was used as the reagent gas. Beside, the CAD (Collisionally activated dissociation) technique was applied to perform structural information. From the experimental results, we found that this series of compounds can eliminate one molecule of HNCO typically. In addition, Formation of the dimer ions (2M- H)/sup -/ and their fragment ions could be observed too. The relationship between the structural difference with their reactivity will be discussed in great details.
    關聯: 第七屆分析化學技術交流研討會暨一九九九台北國際分析化學研討會會後會:研討會會程與論文摘要=7th Annual Conference for Technical Communication on Analytical Chemistry and 1999 International Chemical Conference, Taipei: Analytical Chemistry--Post Conference: Final Program & Abstract Book
    显示于类别:[化學學系暨研究所] 會議論文


    档案 大小格式浏览次数
    Characterization of Uracil Compouds and Their Derivatives by Negative Ion Analysis in an Ion Trap Tandem Mass Spectrometer_英文摘要.docx18KbMicrosoft Word84检视/开启



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