馬一中臺灣大學：環境衛生研究所林冠宇Lin, Kuan-YuKuan-YuLin2007-11-282018-06-302007-11-282018-06-302004http://ntur.lib.ntu.edu.tw//handle/246246/59790本研究重點在於利用現有的儀器設備，偵測呼出氣體中所含揮發性有機物，並探討環境衛生上的應用。針對所偵測到的揮發性有機物進行物種鑑定，並比較抽菸者與非抽菸者的呼出VOCs的差異性。最後比較抽菸者抽菸前後的呼出VOCs，觀察相同時間間隔所測得的物種以及強度在抽菸前與抽菸後的變化情形。 本研究以採樣袋收集呼出氣體，再使用採樣幫浦以定流速抽出並通過複合床熱脫附採樣管採集呼出氣體中的揮發性有機物。樣品分析使用熱脫附儀並以低溫濃縮捕集裝置(-150℃)將VOCs濃縮，再以氣相層析質譜儀進行分析。在定性方面是將所得層析後的質譜圖經背景或部份重疊的干擾物去除後，與現有之標準圖譜資料庫(Wiley 275 Library)直接做搜尋與比對的工作。定量部份，以樣品於圖譜上的積分面積與內標準品的比值來推算，為semiquantitative(半定量)。 結果顯示由本採樣分析方法可偵測到170種以上的揮發性有機物，包括烷類、烯類、酮類、醛類、酯類、呋喃類、芳香族化合物、硫化物、含氯化合物、含氮化合物，以及其他無法直接由圖譜資料庫比對鑑定的未知物。收集抽菸者與非抽菸者的呼出氣體進行比較，發現有7種化合物僅在抽菸者的呼出氣體中出現，21種化合物在兩組間的比較達統計上的差異(P<0.05)。比較抽菸者抽菸前後呼出VOC的變化情形，結果顯示抽菸後大部分VOCs的訊號強度立即上升但亦快速下降。This study was aimed to utilize the equipment in being to detect volatile organic compounds (VOCs) in exhaled air and apply it in environmental health. VOCs collected from smokers’ and nonsmokers’ exhaled air were identified and compared. The VOCs’ patterns in smokers’ exhaled air before and after smoking were observed. This study employed sampling bags to collect exhaled air and used multi-bed sorbent traps and sampling pump to concentrate VOCs. The VOCs sample was thermal desorbed and focused by a cryogenic trap, then analyzed by GC/MS. In identification, after background or overlapping peak subtraction, mass spectrum of each compound was identified by Wiley 275 library. The ratio of compound peak integrating area and internal standard peak integrating area was used to estimate the relative abundance of the VOCs (semiquantitative). About 170 VOCs were detected, including alkanes, alkenes, ketone, aldehyde, ester, furan, aromatics, sulfur compounds, chlorinate species, nitrogen containing species, and some unidentified species. Comparing smokers’ and nonsmokers’ exhaled air, 7 compounds were detected only in smoker’s sample, and 21 compounds were significantly (P<0.05) different between two groups. When the patterns of VOCs in smokers’ exhaled air before and after smoking were studied, we found that most of the VOCs’ abundance increased in exhaled air immediately after smoking, but rapidly decreased after 10 min.摘要 I Abstract II 目錄 IV 表目錄 VI 圖目錄 VII 第一章 緒論 1 1-1前言 1 1-2研究動機 1 1-3研究目的 2 1-4研究架構 2 第二章 文獻探討 4 2-1揮發性有機物(Volatile Organic Compounds, VOCs) 4 2-2呼出VOCs採樣方法 4 2-3影響分析的干擾因素 6 2-4呼出VOCs的來源與代表意義 7 2-4-1氧化壓力指標 7 2-4-2特殊暴露的評估 9 2-4-3疾病診斷 9 第三章 實驗方法與流程 11 3-1實驗器材與設備 11 3-1-1藥品、試劑及氣體 11 3-1-2實驗儀器 12 3-2前處理 13 3-2-1採樣管之填充 13 3-2-2保存箱 13 3-2-3採樣管調態(Conditioning) 13 3-2-4採樣之流量校正 14 3-2-5採樣袋淨化 14 3-2-6採樣裝置 14 3-3採樣步驟 14 3-4分析步驟 15 3-4-1熱脫附儀上機前調態 15 3-4-2氣相層析質譜儀 15 3-4-3儀器空白的確定 16 3-4-4上機分析 16 3-5儀器條件 17 3-5-1熱脫附裝置 17 3-5-2低溫捕集器(Cryo-Focus Module, CFM) 17 3-5-3氣相層析儀 17 3-5-4質譜儀 18 3-6空白樣品分析 18 3-6-1試劑空白 18 3-6-2保存空白 18 3-6-3現場空白 19 3-7重複樣品分析 19 3-8品質管制 19 3-9破出試驗 19 3-10數據收集、處理及統計分析 19 第四章 結果與討論 21 4-1實驗QA/QC 21 4-1-1空白試驗 22 4-1-2重複樣品 22 4-1-3品質管制圖 23 4-1-4 破出試驗 23 4-2定性分析 23 4-3半定量分析 25 4-3-1肺泡氣體含量梯度(Alveolar Gradients) 26 4-4 個案收集與比較 27 4-4-1抽菸受試者與非抽菸受試者的比較 27 4-4-2抽煙前後呼出氣體的變化情形 29 第五章 結論 32 第六章 參考文獻 341072454 bytesapplication/pdfen-US熱脫附物種鑑定揮發性有機物呼出氣體volatile organic compoundchemical species identificationthermal desorptionexhaled air[SDGs]SDG3thesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/59790/1/ntu-93-R91844009-1.pdf