對位取代苯酚化合物氧化縮合後螢光強度探討及大氣中臭氧濃度之監測應用研究

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/3598

Title:	對位取代苯酚化合物氧化縮合後螢光強度探討及大氣中臭氧濃度之監測應用研究
Authors:	鄧智文;Chih-Wen Teng
Contributors:	化學工程與材料工程研究所
Keywords:	對位羥基苯乙酸;螢光;對位乙醯胺基苯酚;簡易分子擴散捕集器;臭氧;雙分子;二甲基甲醯胺;p-Hydroxyphenylacetic acid;fluorescent;p-Acetamidophenol;a diffusive simple sampler;ozone;dimmer;DMF
Date:	2000-07-04
Issue Date:	2009-09-21 12:18:36 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	大氣中臭氧濃度對於生態環境具有相當之影響性，其濃度高低之測定只有藉昂貴之監測儀器。對於全面性多點之臭氧濃度監測便無法使用，因此池浦太莊開發簡易分子擴散捕集器，利用分子擴散之原理且不需動力之優點來進行臭氧濃度監測。以分子擴散捕集器監測大氣中臭氧濃度，使用對位乙醯胺基苯酚為捕集反應液，其螢光強度大小與監測站測得之臭氧濃度比對，以瞭解大氣環境中各地點的臭氧濃度。由於此法微受大氣環境條件改變之影響，且無明確數據示知螢光強度與臭氧濃度間之相關性，故以洗滌吸收法之採樣方式，以及提升監測臭氧之敏感值之前提下改變反應液成分兩方面進行研究。以分子擴散捕集法與洗滌吸收法比較其準確性，因分子擴散捕集法只能對大氣中臭氧濃度定性，而洗滌吸收法吸收一定體積之氣體與對位乙醯胺基苯酚液作用後，所產生之螢光強度和監測站提供之臭氧濃度監測值整理後，可得下列實驗關係式，由螢光強度之測定以推算大氣中臭氧濃度，達到對臭氧濃度定量的目的。無螢光性單分子之對位乙醯胺基苯酚或對位羥基苯乙酸，於硼酸或碳氫酸鉀緩衝液中，與氧化劑(赤血鹽或臭氧)作用為螢光性雙分子，探討反應後溶液之螢光強度及加入二甲基甲醯胺後螢光強度之變化，作為分析大氣中臭氧濃度測定依據，其中以對位乙醯胺基苯酚作為測大氣中臭氧濃度之最佳反應劑。 Taisoh IKEURA developed a diffusive simple sampler to sample ozone in atmosphere. The equipment was used to illustrate the atmospheric ozone concentration through measuring the fluorescent intensity of p-Acetamidophenol (p-AAP) solution after sampling. The results of this method correspond to the variation of atmospheric conditions. The relative relationship between the fluorescent intensity measured by diffusive simple sampler and atmospheric ozone concentration could not be directly shown. In this study, by utilizing the micro-bubble impinger improved from gas sampling impinger, the fluorescent intensity transformed from the oxidative dimerzation of the fixed amount of air gathered and p-AAP solution, and the concentration of ozone from the atmospheres monitor station acquired at the same time, an equation can be formed as follows. A more specific concentration of ozone can be acquired through fluorescent intensity. After the oxidative dimerization that added oxidants(hydrogen peroxide, potassium ferricyanide or ozone) to the p-hydroxyphenol compounds (p-Acetamidophenol(p-AAP) and p-Hydroxyphenylacetic acid (p-HPAA)) of non-fluorescent monomers in the buffer solution to form flourescent dimmers, use the variation of the fluorescent intensity before and after the addition of DMF solvent as the index of the atmospheric ozone concentration. It is observed that p-AAP solution is the best substrate to determine the atmospheric ozone concentration.
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] Electronic Thesis & Dissertation

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