Step-Scan T-Cell Fourier Transform Infrared Photoacoustic Spectroscopy (FTIR-PAS) for Monitoring Environmental Air Pollutants

Content Provider	Semantic Scholar
Author	Liu, Lixian Mandelis, Andreas Melnikov, Alexander Michaelian, Kirk H. Huan, Huiting Haisch, Christoph
Copyright Year	2016
Abstract	Air pollutants have adverse effects on the Earth’s climate system. There is an urgent need for cost-effective devices capable of recognizing and detecting various ambient pollutants. An FTIR photoacoustic spectroscopy (FTIR-PAS) method based on a commercial FTIR spectrometer developed for air contamination monitoring will be presented. A resonant T-cell was determined to be the most appropriate resonator in view of the low-frequency requirement and space limitations in the sample compartment. Step-scan FTIR-PAS theory for regular cylinder resonator has been described as a reference for prediction of T-cell vibration principles. Both simulated amplitude and phase responses of the T-cell show good agreement with measurement data Carbon dioxide IR absorption spectra were used to demonstrate the capacity of the FTIR-PAS method to detect ambient pollutants. The theoretical detection limit for carbon dioxide was found to be 4 ppmv. A linear response to carbon dioxide concentration was found in the range from 2500 ppmv to 5000 ppmv. The results indicate that it is possible to use step-scan FTIR-PAS with a T-cell as a quantitative method for analysis of ambient contaminants.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1007/s10765-016-2070-0
Volume Number	37
Alternate Webpage(s)	https://cadipt.mie.utoronto.ca/wp-content/uploads/2017/02/IJT_37_64_2016.pdf
Alternate Webpage(s)	https://doi.org/10.1007/s10765-016-2070-0
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article