Rapid, broadband sensing of chemical warfare simulants using mid-infrared spectroscopy

Yue An; Zakaria Juracka; Mohammad A. Khan

doi:10.1117/12.2619120

30 May 2022 Rapid, broadband sensing of chemical warfare simulants using mid-infrared spectroscopy

Yue An, Zakaria Juracka, Mohammad A. Khan

Proceedings Volume 12116, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIII; 121161A (2022) https://doi.org/10.1117/12.2619120
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

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Abstract

Several chemical warfare chemicals have fingerprint spectral signatures in the mid-infrared region of the spectrum. For instance, Sarin is one of the most lethal warfare agents that is a highly toxic synthetic chemical organophos phorus compound. Due to complex chemical structure and large absorption and collision cross-section, the molecular linewidths of such chemicals can cover a broad range of spectral width. Detection of such molecules in the mid-infrared region is sensitive which requires broadly tunable sources and detection methods. We show a rapid detection methodology of such chemicals using proxy methane and nitrous oxide atmospheric bands in the 7 µm to 8 µm region which also have fingerprints region of several hazardous chemicals. Methane absorbs strongly in the wavelength range of 3 µm to 8 µm, nitrous oxide has absorption from 5 µm to 8 µm. As the large wavelength range that they have covered, we use molecular rotational-vibrational transitions of CH4

Citation Download Citation

Yue An, Zakaria Juracka, and Mohammad A. Khan "Rapid, broadband sensing of chemical warfare simulants using mid-infrared spectroscopy", Proc. SPIE 12116, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIII, 121161A (30 May 2022); https://doi.org/10.1117/12.2619120

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