University of Illinois Urbana-Champaign

Highly Selective Gas Analyzer Based On Molecular Rotational Resonance Spectroscopy For So2 Monitoring In Ambient Air

Twagirayezu, Sylvestre

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ML10_1.pptx
6395.pdf

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https://hdl.handle.net/2142/116838

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Title
Highly Selective Gas Analyzer Based On Molecular Rotational Resonance Spectroscopy For So2 Monitoring In Ambient Air
Author(s)
Twagirayezu, Sylvestre
Contributor(s)
  • Neill, Justin L.
  • Jamil, Md Abrar
Issue Date
2022-06-20
Keyword(s)
Small molecules
Abstract
As part of the efforts to determine the applications of molecular rotational resonance (MRR) technique to SO$_{2}$ monitoring in ambient air, a K-band MRR analyzer has been employed to record the MRR signature of multiple synthetic air samples containing SO$_{2}$ pollutant as well as that of standard SO$_{2}$ samples. The observed MRR features reveal a rich rotational pattern due to MRR’s sensitivity. The interfering matrix (i.e., air moisture), which typically challenges other conventional techniques, showed no impact on MRR signatures of SO$_{2}$. The validity of MRR for SO$_{2}$ monitoring has been examined by measuring MRR signal response of a set of standard SO$_{2}$ samples over a range of sampling pressures (5-15). The obtained linear correlations allowed the determination of recovery percentage (97-100\%) and low detection limit of better than 1mg/m$^{3}$. Work to improve this analytical procedure is underway and will be reported in this talk.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Handle URL
https://hdl.handle.net/2142/116838
DOI
https://doi.org/10.15278/isms.2022.ML10
Copyright and License Information
Copyright 2022 held by the authors

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Abstracts & Presentations - 2022 International Symposium on Molecular Spectroscopy PRIMARY