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研究生:洪崇原
論文名稱:自行設計冷凝前濃縮系統搭配自動化氣相層析質譜儀量測空氣中微量揮發性有機化合物
論文名稱(外文):Self-fabricated pre-concentration module coupled with automated gas chromatography/mass sprctrometry for measurement of volatile organic compounds in ambient air
指導教授:羅俊光羅俊光引用關係吳劍侯
學位類別:碩士
校院名稱:國立清華大學
系所名稱:原子科學系
學門:工程學門
學類:核子工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:107
中文關鍵詞:冷凝前濃縮系統多重床吸附劑自動化氣相層析質譜儀揮發性有機化合物前濃縮
外文關鍵詞:sample pre-concentration systemVOCsmultiple-bed adsorbentGC/MS
相關次數:
  • 被引用被引用:1
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  • 下載下載:20
  • 收藏至我的研究室書目清單書目收藏:0
本研究成功地開發出一套免用液態氮(LN2)的冷凝前濃縮系統,結合冷凍壓縮機(refrigeration)及多重床吸附劑,利用低溫冷凝吸附原理作為濃縮機制,此冷凝前濃縮系統可與商業化氣相層析儀結合,並自動化,無液態氮氣消耗的困擾,可提供<-40 0C 的低溫,售價便宜等多項優點,同時改善多重床吸附劑,在室溫下對 C2化合物無法完全吸附,造成分析感度不佳的原因。
此冷凝前濃縮系統搭配不鏽鋼採樣罐/自動化氣相層析質譜儀分析系統,分析非極性揮發性有機化合物C1-C8(TO-14A),共36種及極性揮發性有機化合物C2-C7,共19種,揮發性有機化合物(VOCs)共計55種,其所建立的分析方法品保品管皆符合規範,真實採樣為量測新竹科學園區污水處理廠各重要處理單元,了解VOCs逸散至空氣的概況及主要的污染物。
This research probed development of a sample pre-concentration system (cryogen-free) coupled with automated GC/MS for measurement of volatile organic compounds(VOCs) in ambient air. The sample pre-concentration system includes refrigeration and the multiple-bed adsorbent technique with low temperature condensation and adsorption phenomenon to concentrate VOCs. The system offers several merits such as being automatic, ability to use in combination with commercial instruments, works cryogen-free at condensation temperature of < -40 0C, overcomes the incomplete adsorption of the the C2 compounds onto the multiple-bed adsorbent at room temperature and is relatively low-cost.
With canister sampling and the automated GC/MS, 55 kinds of VOCs constituting 36 kinds of the non-polar VOCs (C1-C8),using TO-14A, and 19 kinds of polar VOCs (C2-C7) were analyzed. QA/QC data implied that the system meets the analytical performance grade of EPA methods. The MDL is in the range of 1.9~11.2ppb.
A successful application of this method is made to analyze the VOCs in the ambient air from the sewer systems and sewage treatment plant of hi-tech industrial park. In the sewage treatment plant, 11 kinds of VOCs were measured in air sample, among which acetone is the major pollutant, detected with a highest concentration of 512.2 ppbv.
謝誌…………………………………………………………………Ⅰ
中文摘要……………………………………………………………Ⅱ
英文摘要……………………………………………………………Ⅲ
目錄…………………………………………………………………Ⅳ
圖目錄………………………………………………………………Ⅶ
表目錄………………………………………………………………Ⅸ
第一章 緒論…………………………………………………………1
1.1研究緣由…………………………………………………………1
1.2研究目的…………………………………………………………2
第二章 文獻回顧……………………………………………………4
2.1 目標分析物……………………………………………………4
2.1.1 非極性揮發性有機化合物…………………………………4
2.1.2 極性揮發性有機化合物……………………………………6
2.2空氣中揮發性有機化合物分析方法……………………………7
2.2.1採樣方法………………………………………………………8
2.2.2前濃縮方法……………………………………………………9
2.2.3分析方法………………………………………………………14
2.3干擾………………………………………………………………15
2.3.1採樣干擾………………………………………………………15
2.3.2前濃縮系統干擾………………………………………………16
2.3.3分析系統干擾…………………………………………………16
第三章 實驗與研究方法……………………………………………25
3.1 儀器設備………………………………………………………25
3.2 分析方法………………………………………………………29
3.2.1採樣方法………………………………………………………29
3.2.2樣品分析方法…………………………………………………31
3.2.3數據處理方法…………………………………………………36
3.3系統最佳化參數探討與測試……………………………………37
3.3.1目標分析物參數測試…………………………………………37
3.3.2冷凝前濃縮系統參數測試……………………………………38
3.3.3熱脫附系統參數測試…………………………………………39
3.4方法接受性評估…………………………………………………40
3.4.1檢量線…………………………………………………………40
3.4.2精密度…………………………………………………………40
3.4.3準確度…………………………………………………………40
3.4.4方法偵測極限…………………………………………………41
3.4.5系統穩定度……………………………………………………42
3.5真實樣品分析……………………………………………………42
3.5.1採樣規劃………………………………………………………42
3.5.2採樣點…………………………………………………………43
3.5.3採樣……………………………………………………………………43
第四章 結果與討論…………………………………………………56
4.1系統最佳化測試…………………………………………………56
4.1.1目標分析物參數測試…………………………………………56
4.1.2冷凝前濃縮系統參數測試……………………………………59
4.1.3熱脫附系統參數測試…………………………………………62
4.2方法接受性結果…………………………………………………63
4.2.1檢量線………………………………………………………63
4.2.2精密度………………………………………………………64
4.2.3準確度………………………………………………………64
4.2.4方法偵測極限…………………………………………………64
4.2.5系統穩定度……………………………………………………64
4.3真實樣品分析……………………………………………………65
第五章結論…………………………………………………………93
5.1 總結……………………………………………………………93
5.2未來發展………………………………………………………94
第六章參考文獻……………………………………………………95
附表…………………………………………………………………98
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