English  |  正體中文  |  简体中文  |  Items with full text/Total items : 68069/68069 (100%)
Visitors : 23062347      Online Users : 248
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/25670


    Title: 二維氣相層析技術與質譜儀連接技術運用於VOC自動監測;Development of 2-Dimensional Gc Techniques and the Hypenation with Mass Spectrometer for Automated Voc Monitoring
    Authors: 王家麟
    Contributors: 化學系
    Keywords: 氣相層析儀;質譜儀;二維層析;揮發性有機汙染物;gas chromatograph;mass spectrometry;2-dimensionalchromatography;volatile organic compounds;化學類
    Date: 2010-07-01
    Issue Date: 2010-06-10 17:41:08 (UTC+8)
    Publisher: 行政院國家科學委員會
    Abstract: 有鑒於傳統氣相層析儀只能使用單一毛細管柱而受限於靜相作用力過於單純,往往無法分離大氣中成份複雜、極性或沸點差異大的揮發性有機汙染物,因此同時使用兩支性質不同的毛細管柱的二維氣相層析技術以提供較多元的作用力能夠能大幅改善分離效能受限之窘境。在本研究中將使用兩支不同類型之管柱搭配氣流控制技術得以解決汙染物質因揮發度差異過大、化學結構過於近似、或是極性範圍廣之層析問題。二維氣相層析技術若能與質譜儀結合則更能發揮同時定性與定量之優勢,使大氣 VOC 分析能力以得全面提升,然而二維氣相層析技術通常必須使用兩個偵測器以配合雙管柱,當與質譜儀連接時若同時使用雙質譜則並不實際,若只使用單一質譜時則連接技術困難度大增;再者,質譜儀之負壓環境會造成二維層析使用氣壓栓塞作為管柱切換時之干擾而使得連接質譜更形困難,因此本研究之目的即為開發一系列的二維氣相層析技術,突破單一質譜儀連接技術之瓶頸。In light of the deficiency posed by the single capillary column in GC analysis of a wide range of ambient volatile compounds (VOCs), 2-dimensional GC has the advantage of providing 2 different stationary phases to compliment each other and thus to maximize separation power. In this research two columns of different characteristics are to be employed in conjunction with a pressure switch device to provide the necessary resolution power for VOCs of large volatility and structural difference. It is compelling to combine 2-D GC with mass spectrometry for superior quantification and identification capabilities than the conventional GC detectors. Nevertheless, 2-D GC is usually coupled to dual identical detectors because two columns are eluting at the same time. Moreover, the negative pressure for MS often creates a serious disturbance for the pressure switching device to cut flows between the two columns. As a result, it poses a great obstacle to be overcome in the design a 2-D GC/MS system with only one single mass spectrometer. The ultimate goal of this research is to develop a series of 2-D GC techniques and ultimately an automated 2-D GC/MS system for monitoring a full range of atmospheric VOCs. 研究期間:9808 ~ 9907
    Relation: 財團法人國家實驗研究院科技政策研究與資訊中心
    Appears in Collections:[化學學系] 研究計畫

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML420View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明