Optical path length and absorption cross section optimization for high sensitivity ozone concentration measurement

Long optical path length and strong ozone absorption wavelength are generally applied for high sensitivity ozone concentration measurement in ultraviolet absorption spectroscopy. However, high sensitivity of measurement cannot be achieved when the sensor approaches saturation. Here, we derive two eq...

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Main Authors: Tay, M. C. E., Ibrahim, M. H., Ngajikin, N. H., Azmi, A. I.
Format: Article
Published: Elsevier Ltd. 2015
Subjects:
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author Tay, M. C. E.
Ibrahim, M. H.
Ngajikin, N. H.
Azmi, A. I.
author_facet Tay, M. C. E.
Ibrahim, M. H.
Ngajikin, N. H.
Azmi, A. I.
author_sort Tay, M. C. E.
collection ePrints
description Long optical path length and strong ozone absorption wavelength are generally applied for high sensitivity ozone concentration measurement in ultraviolet absorption spectroscopy. However, high sensitivity of measurement cannot be achieved when the sensor approaches saturation. Here, we derive two equations based on Beer-Lambert law to optimize the sensitivity of measurement. Firstly, we optimize the optical path length for high sensitivity measurement of specific range of ozone concentration. Secondly, we optimize the absorption cross section for proper selection of ozone sampling wavelength to prevent sensor saturation. Simulation and experimental results show high sensor sensitivity for a gas cell of optimized optical path length. High sensitivity of measurement is achieved when the sensor is not saturated. We have validated the requirements for high sensitivity ozone concentration measurement through theoretical calculation, spectralcalc.com simulation and experiment.
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spelling utm.eprints-586982021-09-08T05:45:10Z http://eprints.utm.my/58698/ Optical path length and absorption cross section optimization for high sensitivity ozone concentration measurement Tay, M. C. E. Ibrahim, M. H. Ngajikin, N. H. Azmi, A. I. TK Electrical engineering. Electronics Nuclear engineering Long optical path length and strong ozone absorption wavelength are generally applied for high sensitivity ozone concentration measurement in ultraviolet absorption spectroscopy. However, high sensitivity of measurement cannot be achieved when the sensor approaches saturation. Here, we derive two equations based on Beer-Lambert law to optimize the sensitivity of measurement. Firstly, we optimize the optical path length for high sensitivity measurement of specific range of ozone concentration. Secondly, we optimize the absorption cross section for proper selection of ozone sampling wavelength to prevent sensor saturation. Simulation and experimental results show high sensor sensitivity for a gas cell of optimized optical path length. High sensitivity of measurement is achieved when the sensor is not saturated. We have validated the requirements for high sensitivity ozone concentration measurement through theoretical calculation, spectralcalc.com simulation and experiment. Elsevier Ltd. 2015 Article PeerReviewed Tay, M. C. E. and Ibrahim, M. H. and Ngajikin, N. H. and Azmi, A. I. (2015) Optical path length and absorption cross section optimization for high sensitivity ozone concentration measurement. Sensors And Actuators, B: Chemical, 221 . pp. 570-575. ISSN 9254-005 http://www.dx.doi.org/10.1016/j.snb.2015.07.005 DOI: 10.1016/j.snb.2015.07.005
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Tay, M. C. E.
Ibrahim, M. H.
Ngajikin, N. H.
Azmi, A. I.
Optical path length and absorption cross section optimization for high sensitivity ozone concentration measurement
title Optical path length and absorption cross section optimization for high sensitivity ozone concentration measurement
title_full Optical path length and absorption cross section optimization for high sensitivity ozone concentration measurement
title_fullStr Optical path length and absorption cross section optimization for high sensitivity ozone concentration measurement
title_full_unstemmed Optical path length and absorption cross section optimization for high sensitivity ozone concentration measurement
title_short Optical path length and absorption cross section optimization for high sensitivity ozone concentration measurement
title_sort optical path length and absorption cross section optimization for high sensitivity ozone concentration measurement
topic TK Electrical engineering. Electronics Nuclear engineering
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