PDMS薄膜應用在揮發性有機物感測器的質傳擴散特性模擬

PDMS Membrane Mass Transport Characteristics in a Volatile Organic Compound Detector by Computer Simulation

周宜成(I-Cheng Chou) ； 陳宏達(Hung-Ta Chen) ； 張士元(Shih-Yuen Chang) ； 涂茂園(Mao-Yuan Tu)

《化學》 74卷4期 (2016/12) Pp. 297-302

https://doi.org/10.6623/chem.2016023

摘要

在環境化學分析的領域中，工作首要就是鑑定環境中可能存在化合物，以評估其在環境、生態、以及人體的傳輸方式及可能影響。近年來，隨著即時偵測技術的演進，得以快速且準確的鑑定低濃度氣態有機物的種類。本研究由可攜式飛行時間質譜儀與聚二甲基矽氧烷(polydimethylsilicone, PDMS)薄膜，兩者組成的直接膜進樣質譜儀(direct inlet membrane introduction mass spectrometer, MIMS)作為即時偵測器，量測苯與甲苯等工業上常見揮發性有機物氣體。此外，研究中並建立電腦模式，動態模擬PDMS膜質傳過程對實驗的MIMS設備影響及質傳擴散特性，並提出可能提升MIMS定量定性準確度及精確度的操作方式，可做為未來相關技術開發及改良設備可靠度的方向。

關鍵字

聚二甲基矽氧烷薄膜 ； 飛行時間質譜儀 ； 揮發性有機物 ； 電腦模擬

並列摘要

In the environmental chemical research, identification of chemicals in the environment is the first thing to do before assessing their possible adverse effect on ecology and human being. In recent years, due to the revolution of real-time detection technology, it is possible to identify the low concentration organic compounds. The real-time portable volatile organic compound analyzer adopted in this study to measure the benzene and toluene vapors were combined with a portable time-of-flight mass spectrometers (TOF-MS) and polydimethylsilicone (PDMS) membranes. Moreover, a Berkeley Madonna program was used to build a MIMS simulation model to reveal the mass transformation characteristics in PDMS membranes. Feasibility of further operation revision and instrument modification to improve the precision and accuracy of MIMS were discussed in this study by the computer modeling simulation data.

並列關鍵字

PDMS membrane ； TOF-MS ； VOCs ； Computer simulation