本研究使用PSM連續式自動進樣器搭配矽烷化不□鋼管作為進樣裝置，以吹氣捕捉裝置為前濃縮方法，再利用氣相層析/火焰游離偵檢器做為分析儀器，並設置一套自動化管路清洗系統，完全由商業化的自動吹氣捕捉裝置控制，如此建立一套可用於分析現場的現場自動化即時連續監測分析系統，可同時分析水中17種高科技產業常見的揮發性有機化合物，包括丙酮(Acetone)、三氯甲烷(Chloroform)、苯(Benzene)、甲苯(Toluene)及萘(Naphthalene)等有機化合物，本方法的各物種校正曲線R-Square值均高於0.993，方法偵測極限丙酮(Acetone)為9.07ppb，其他物種介於0.32~2.39pbb，精確度在15%之內，準確度介於0.27%~23.54%，適合用於長時間即時連續監測。
本研究並在5月26日凌晨至28日下午五時及6月15日晚間九時至17日中午12時於污水廠放流口進行現場連續分析，由結果可看出監測期間內所測得物種的總濃度分佈趨勢，也可了解各別物種濃度對時間的關係，由所得數據可知丙酮(Acetone)在分析物種總濃度佔有很高比例，其他例如三氯甲烷(Chloroform)、三氯乙烯(Trichloroethylene)、甲苯(Toluene)、二氯苯(1,4-Dichlorobenzene)、三氯苯(1,2,4-Trichlorobenzene)以及萘(Naphthalene)等化合物也在本次的現場即時監測中被偵測出。

ABSTRACT
For real-time monitoring of VOCs in wastewater discharged from high-tech industries, an automatic sampling device, process sampling module (PSM) connected with PT-GC-FID system was developed. The system was designed to simultaneously monitor 17 compounds, including one polar compound, acetone, and 16 non-polar compounds, such as benzene, toluene, chloroform, etc. The trapping tube designed is 20 cm in length and 1/8” in O.D, and was packed with two adsorbents, carbopackB and carbosieve III, to trap the target compounds. For the purpose of in-situ monitoring, the flush of sampling tube composed of two two-way valves and one time controller to prevent the absorption interference of the residual. The optimum condition for the analytical system was 12min of purge time at 60℃ (purge temperature) and 4min of desorption time at 260℃ (desorption temperature). Good chromatograms were obtained with the developed analytical system even if cryogenic device and de-mist process were not used. The precision was high (RSD 1.99%~13.35%) and the accuracy was achieved at the level between 0.27% to 23.54%. The method detection limits ranged from 0.32 to 2.39 ppb. Variations of the VOCs concentration in wastewater discharged from high-tech industries were obtained and recorded from two times three day sampling campaign during 2004/05/26 to 2004/05/28 and 2004/06/15 to 2004/06/17.

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