Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
Sci Rep. 2013;3:2525. doi: 10.1038/srep02525.
Chlorinated aliphatic hydrocarbons and chlorinated aromatic hydrocarbons (CHCs) are toxic and carcinogenic contaminants commonly found in environmental samples, and efficient online detection of these contaminants is still challenging at the present stage. Here, we report an advanced Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR) sensor for in-situ and simultaneous detection of multiple CHCs, including monochlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, trichloroethylene, perchloroethylene, and chloroform. The polycrystalline silver halide sensor fiber had a unique integrated planar-cylindric geometry, and was coated with an ethylene/propylene copolymer membrane to act as a solid phase extractor, which greatly amplified the analytical signal and contributed to a higher detection sensitivity compared to the previously reported sensors. This system exhibited a high detection sensitivity towards the CHCs mixture at a wide concentration range of 5~700 ppb. The FTIR-ATR sensor described in this study has a high potential to be utilized as a trace-sensitive on-line device for water contamination monitoring.
氯化脂肪烃和氯化芳香烃（CHCs）是环境样品中常见的有毒和致癌污染物，在现阶段，对这些污染物进行有效的在线检测仍然具有挑战性。在这里，我们报告了一种先进的傅里叶变换衰减全反射（FTIR-ATR）传感器，用于原位和同时检测多种 CHCs，包括氯苯、1,2-二氯苯、1,3-二氯苯、三氯乙烯、四氯乙烯和氯仿。多晶卤化银传感器光纤具有独特的集成平面圆柱几何形状，并涂有乙烯/丙烯共聚物膜作为固相萃取剂，与以前报道的传感器相比，这大大放大了分析信号，并提高了检测灵敏度。该系统对 CHCs 混合物在 5~700 ppb 的宽浓度范围内表现出高检测灵敏度。本研究中描述的 FTIR-ATR 传感器具有作为痕量敏感在线水污染物监测装置的高潜力。
