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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Format: | Article |
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Elsevier Ltd.
2015
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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. |
first_indexed | 2024-03-05T19:43:11Z |
format | Article |
id | utm.eprints-58698 |
institution | Universiti Teknologi Malaysia - ePrints |
last_indexed | 2024-03-05T19:43:11Z |
publishDate | 2015 |
publisher | Elsevier Ltd. |
record_format | dspace |
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 |
work_keys_str_mv | AT taymce opticalpathlengthandabsorptioncrosssectionoptimizationforhighsensitivityozoneconcentrationmeasurement AT ibrahimmh opticalpathlengthandabsorptioncrosssectionoptimizationforhighsensitivityozoneconcentrationmeasurement AT ngajikinnh opticalpathlengthandabsorptioncrosssectionoptimizationforhighsensitivityozoneconcentrationmeasurement AT azmiai opticalpathlengthandabsorptioncrosssectionoptimizationforhighsensitivityozoneconcentrationmeasurement |