de Melas Fabiano, Pustogov Viktor V, Croitoru Nathan, Mizaikoff Boris
Vienna University of Technology, Institute of Analytical Chemistry, A-1060 Vienna, Austria.
Appl Spectrosc. 2003 Jun;57(6):600-6. doi: 10.1366/000370203322005265.
A gas sensor for application in water analysis was developed by combination of a mid-infrared (MIR) hollow waveguide with a Fourier transform infrared (FT-IR) spectrometer and coupling of the hollow waveguide gas sensor module to a supported capillary membrane sampler (SCMS) for continuous liquid-gas extraction. Different hollow waveguides have been characterized in this study for developing an optimized optical configuration. Analysis of industrially relevant compounds has been performed, investigating chlorinated hydrocarbons (CHCs), such as dichloromethane and chloroform, representing highly volatile analytes, and 1,4-dioxane as an example of target compounds with low volatility. The suitability of this spectroscopic IR sensing system for industrial applications is demonstrated under simulated real-world conditions with limits of detection in the ppb (v/v) and ppm (v/v) concentration range for CHCs and 1,4-dioxane, respectively.
通过将中红外（MIR）中空波导与傅里叶变换红外（FT-IR）光谱仪相结合，并将中空波导气体传感器模块与支撑毛细管膜采样器（SCMS）耦合以进行连续液-气萃取，开发了一种用于水分析的气体传感器。在本研究中，对不同的中空波导进行了表征，以开发优化的光学配置。已对工业相关化合物进行了分析，研究了氯代烃（CHC），如代表高挥发性分析物的二氯甲烷和氯仿，以及作为低挥发性目标化合物示例的1,4-二氧六环。在模拟实际条件下证明了这种红外光谱传感系统对工业应用的适用性，CHC和1,4-二氧六环的检测限分别在ppb（v/v）和ppm（v/v）浓度范围内。
