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研究生:黃祐杰
研究生(外文):Huang, You-Jie
論文名稱:電流式微小氬氣電漿-氣相層析偵測器
論文名稱(外文):A Current Type Gas Chromatography Detector Employing Micro Argon Plasma
指導教授:呂家榮呂家榮引用關係
指導教授(外文):Lu, Chia-Jung
學位類別:碩士
校院名稱:國立臺灣師範大學
系所名稱:化學系
學門:自然科學學門
學類:化學學類
論文種類:學術論文
論文出版年:2016
畢業學年度:104
語文別:中文
論文頁數:77
中文關鍵詞:介電質常壓電漿氣相層析
外文關鍵詞:dielectric barrieratmospheric plasmagas chromatography
相關次數:
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  • 下載下載:19
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摘要
本實驗利用自行組裝的微型化介電質放電電漿應用於揮發性有機氣體分子的偵測,此微型化電漿偵測器是把不鏽鋼毛細管柱塞入玻璃管中密封後,並於玻璃管外纏繞電線製作而成。於電極兩端施加電壓9 kVp-p的高壓交流電後,可於常壓環境下形成穩定的電漿。本研究以氬氣作為載流氣體偵測訊號,當揮發性有機氣體通過電漿時,會和電漿中的氬離子發生反應,導致氬氣電漿的背景電壓值有明顯的變化。本研究進一步探討感測電極與電漿的距離、流速、電壓與反應訊號之間的關係,以找出在每一個不同變因下的最佳條件。當不同官能基的有機氣體分子,如烷類、醇類、酮類、酯類、芳香族;及鹵化物通過氬氣電漿時,皆有明顯的訊號變化。且訊號強度會隨著有機物碳鏈長度的增加而有逐漸增強的趨勢。本偵測器對iso-butanol的最低偵測下限為1.61 ng。此偵測器的優點為體積小、製作成本低,且有機氣體通過電漿時,訊號皆會有明顯的變化,因此可以應用於揮發性有機氣體的偵測。
關鍵字:介電質、常壓電漿、氣相層析
Abstract
A self-assembly miniaturized dielectric barrier discharge plasma has applied for the detection of volatile organic gas molecules in this experiment. This miniaturized plasma detector was made by inserting a stainless steel capillary column into a glass tube and sealed it inside a glass tube, then tangled an electric wire around the glass tube. A high-voltage alternating current was applied on both electrodes, a stable plasma was generated under atmospheric pressure. In this experiment , we use argon as a carrier gas to detect signal. When volatile organic gas molecules passed through the plasma, they would reacted with argon ions in the plasma, caused an obviously change in the background voltage of argon plasma. This research further investigated the correlation of the distance between the electrode and plasma, flow rate and voltage to the response of detector ,to find the optimum condition in each variables. When organic gas molecules with different functional groups, such as: alkanes, alcohols, ketones, esters, aromatics and halide passed through the argon plasma ,they all caused an obviously change in the signal. And the intensity of the signal would gradually increased followed by the increasing of the length of carbon chain of organic compounds. The lowest detection limit of this detector for iso-butanol was 1.61 ng. This detector has the advantages of small volume, low cost, and would showed a significant change in the intensity of the signal when organic gas molecules passed through the plasma, therefore, it can be applied for the detection of volatile organic gas molecules.
Key words:dielectric barrier、atmospheric plasma、gas chromatography
目錄
摘要 ................................i
Abstract ...........................ii
目錄 ............................ iii
圖目錄 ..............................v
表目錄 ..............................viii
第一章 緒論.............................1
1-1前言 ................................. 1
1-2電漿簡介及其應用 ........................3
1-3電漿性質 .............................6
1-4不同放電形式的電漿以及在分析領域上之應用 ...8
1-5介電質放電電漿 ..........................11
1-6電漿反應機制探討 ........................13
第二章 實驗部分 ............................15
2-1實驗藥品、儀器設備 .......................15
2-1.1 實驗藥品 .............................15
2-1.2 實驗器材 .............................16
2-1.3 實驗設備 .............................17
2-2電漿偵測器的製作 .........................19
2-3實驗電路示意圖 ...........................23
2-4 LabVIEW程式 ...........................25
2-5氣體採樣袋的配製 .........................29
2-6高壓電源的量測 ...........................31
2-7實驗系統架設圖 ...........................33
第三章 結果與討論 ...........................34
3-1電極與電漿距離對氰氣電漿及樣品訊號的影響 .....34
3-2載流氣體流速對氰氣電漿及樣品訊號的影響 .......39
3-3施加不同交流電電壓對氰氣電漿噴焰和樣品訊號的影響 .43
3-4施加不同直流電電壓對背景氣體和樣品訊號的影響 .....47
3-5感測電極的積碳對樣品再現性的比較 ................50
3-6氬氣電漿定性及定量分析混合有機氣體 ..............53
3-7電漿偵測器與火焰離子偵測器對樣品訊號的比較 ....... 63
3-7.1不同碳數鏈烷類反應性比較 ..................... 63
3-7.2不同官能基化合物的訊號比較 .....................67
3-8氬氣電漿內反應機制探討 ...........................70
第四章 結論..................................... 73
參考文獻 ..........................................74
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