Determination of chlorinated hydrocarbons in water using highly sensitive mid-infrared sensor technology

Rui Lu, Boris Mizaikoff*, Wen Wei Li, Chen Qian, Abraham Katzir, Yosef Raichlin, Guo Ping Sheng, Han Qing Yu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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∼700â€...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.

Original languageEnglish
Article number2525
JournalScientific Reports
Volume3
DOIs
StatePublished - 2013

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