紅外光感測器偵測水溶液中氯化苯胺之方法比較

Comparison of Infrared Sensing Methods for Detection Chloroanilines in Aqueous Solutions

蔡芳珮(Fang-Pei Tsai)

指導教授 ： 楊吉斯

中原大學/理學院/化學研究所/碩士(2001年)

https://doi.org/10.6840/cycu200100008

摘要

摘 要
紅外光感測器能快速且非破壞性的測取水溶液中之有機質。紅外光應用於吸附分析偵測方面有三個方式較為顯著，包括減衰式全反射（ATR）、穿透吸收（TA）以及反射吸收（RA）。然而此三種方式各具限制，如ATR受駐波深度之限制且需使用價格昂貴之內反射光學元件，TA受限於薄膜材質的光譜、分子排列結構及水干擾，而RA受限於光纖之能量損失、需光纖組配合檢測等，使得此三種感測方式其靈敏度及應用有諸多限制，故本研究旨在提出新式紅外光感測方式，以突破現行紅外光感測方式之限制，並有鑑於ATR偵測方式為最常被廣泛使用於偵測水溶液中之有機質。因此，將所提出之新方法與ATR進行系統性的探討於偵測水溶液中氯化苯胺之優劣性。且為提高紅外光感測器之靈敏度，感測法皆結合固相微量萃取法（SPME）用以去除水干擾及增加檢測水溶液中揮發性有機樣品之靈敏度，亦即於典型紅外光感測元件表面塗佈上一疏水性薄膜，以達濃縮之用。因此，本研究選擇以polyacrylonitril-co-butadiene(PAB)吸附水溶液中之氯苯胺類化合物，並對此結果進行公平比較。本論文中，分析變數包含線性範圍、靈敏度、偵測極限、訊號-雜訊比值、薄膜厚度和感應速度等，並應用此三種方式於偵測七種氯苯胺化合物。最末，研究結果發現此三種偵測方式各自具有其優點。

關鍵字

固相微量萃取法 ； 反射吸收 ； 穿透吸收 ； 減衰式全反射 ； 氯苯胺化合物 ； 傅立葉紅外光譜儀

並列摘要

Abstract
Infrared optical sensor provides fast and non-destructive method in detection of organic compounds in aqueous solutions. Three modes are frequently used in the infrared sensing devices including the attenuated total reflectance (ATR), transmittance, and reflection-absorption. However, each of them is restrictive for example, ATR is restricted by depth of penetration (dp) and expensive internal reflection elements are required in this method , TA is restricted by materials of film and RA is restricted by the loss of energy. In this work, we suggested two new methods in detection of chloroanilines in aqueous solution. One of them is combined T and SPME, another is combined RA and SPME. Then we compared them with ATR systematically. Because infrared sensing elements are typically coated with hydrophobic film to serve as concentration medium, polyacrylonitril-co-butadiene (PAB) was used in this work for attracting chloroanilines in aqueous solutions. To conduct a fair comparison, analytical parameters, such as the linear range, sensitivity, detection limits, signal-to-noise level, film thickness, and speed of detection, were used in this study. After applied these three modes in detection of seven chloroanilines, we found that each detection mode provides its own advantages in detection.

並列關鍵字

FT-IR ； chloroanilines ； SPME ； reflection-absorption ； transmittance ； ATR

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