本計畫擬開發一款連續式線上(in-line)除水暨熱脫附濃縮(thermal desorption; TD)裝置以連接於氣相層析質譜儀(GC/MS)析組成一揮發性有機化合物(volatile organic compounds; VOCs)監測系統。分析時先將一定量之空氣樣品帶至除水裝置先行除去過多的水分，而後再將其中VOCs送入前濃縮裝置以低溫捕捉方式濃縮之，隨即再快速熱脫附至氣相層析質譜儀(GC/MS)中鑑定VOCs中屬於有害空氣污染物(hazardous air pollutants, HAPs)之成分與濃度，經由此監測設備與排放源控制，可望降低HAPs對居民健康及環境所造成的危害。本計畫預期成果包括: (1)開發出連續式除水濃縮氣相層析質譜監測系統(on-line TD-GC/MS)，包括商業化系統硬體與操控軟體；(2)實驗室離線式系統(off-line TD-GC/MS)建立，預計完成目標標準品可定性定量物種目標物達100種以上VOCs，可連續監測物種達資料有效率75%；(3)於工業區現地監測完成至少30日之小時連續現地監測工作，並將本計畫所開發完成之TD-GC/MS/FID系統與環保署標準方法NIEA A715或光化學評估監測站(PAMS)數據進行比對以為驗證。本計畫之除水暨TD設備組裝及調校工作由錦雲技術開發有限公司測試執行，本研究之成果將協助合作廠商解決關鍵技術瓶頸，快速導入科研與環保市場，落實儀器國產化，衍生產業新價值。透過本計畫預計產出培訓碩/博士研究生若干名、完成1件具體且實際運用於合作企業之關鍵技術或新產品、技術轉移1件及發表國際研討會期刊2篇。本研究將於工業區內進行架站測試，並同時比對鄰近光化測站及離線式採樣罐分析之結果，以確保此Online WM-TD-GC/MS數據之可信度。本計畫將開發商業化新型WM-TD-GC/MS系統應用於工業區HAPs連續監測，提供工業區管理單位對於汙染物排放源進行內控，利於自我改善，並可對未知物進行偵測與鑑定，便於未來納入新增之目標化合物。透過線上質譜分析技術的開發及應用，能獲得HAPs物質長時間之濃度分布，以利未來客觀評估HAPs對居民造成之健康風險。 ;This project aims to develop in-line dehydration and thermal desorption (TD) units to couple with gas chromatogrpahy/mass spectrometry (GC/MS) in series to monitor trace-level ambient volatile organic compounds (VOCs) and hazardous air pollutants (HAPs). An aliquot of air sample is first drawn to the dehydration unit to remove excess water vapor to safeguard TD and GC/MS. Subsequently, the VOC analytes are transferred to the TD unit at subambient temperatures for enrichment and focusing. The TD unit is then flashed heated to desorb VOCs onto GC/MS for separation and detection. In order to control ambient levels of HAPS to minimize health risk and protect the environment, the goals of this project are planned as follows: (1) development of a continuous in-line dehydration and TD unit coupling with GC to form a monitoring system for VOCs and HAPs, as well as the establishment of quality assurance/control procedures for accuracy (recovery), precision and detection limits; (2) the establishment of an off-line GC-FID/MS system in the laboratory to perform qualitative and quantitative analysis of more than 100 target standards, and 90% of these target substances can be continuously monitored on the hourly basis; (3) at least 30 days of on-site monitoring will be conducted at the Liuqing Industrial Park, and its analytical performance be validated by the method of NIEA 715 and the PAMS measurements. Jinyun Technology Development Co., Ltd. is responsible for the assembly and fine-tuning of the TD and dehydration units. This project is expected to solve the key issue of in-line dehydration and TD that serves as the core technique in the analysis of trace-level ambient VOCs and HAPs often at sub-ppbv levels. Both master and PhD students will involve in the project and two journal papers can be published as a result. In addition, a complete system of TD-GC/MS/FID is expected to be produced at Jinyun Technology Development Co.
