Detection of Atmospheric Methyl Mercaptan Using Wavelength Modulation Spectroscopy with Multicomponent Spectral Fitting
Detection of methyl mercaptan (CH3SH) is essential for environmental atmosphere assessment and exhaled-breath analysis. This paper presents a sensitive CH3SH sensor based on wavelength modulation spectroscopy (WMS) with a mid-infrared distributed feedback interband cascade laser (DFB-ICL). Multicomp...
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MDPI AG
2017-02-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/17/2/379 |
| _version_ | 1811301505152581632 |
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| author | Zhenhui Du Jiaxin Wan Jinyi Li Gang Luo Hong Gao Yiwen Ma |
| author_facet | Zhenhui Du Jiaxin Wan Jinyi Li Gang Luo Hong Gao Yiwen Ma |
| author_sort | Zhenhui Du |
| collection | DOAJ |
| description | Detection of methyl mercaptan (CH3SH) is essential for environmental atmosphere assessment and exhaled-breath analysis. This paper presents a sensitive CH3SH sensor based on wavelength modulation spectroscopy (WMS) with a mid-infrared distributed feedback interband cascade laser (DFB-ICL). Multicomponent spectral fitting was used not only to enhance the sensitivity of the sensor but also to determine the concentration of interferents (atmospheric water and methane). The results showed that the uncertainties in the measurement of CH3SH, H2O, and CH4 were less than 1.2%, 1.7% and 2.0%, respectively, with an integration time of 10 s. The CH3SH detection limit was as low as 7.1 ppb with an integration time of 295 s. Overall, the reported sensor, boasting the merits of high sensitivity, can be used for atmospheric methyl mercaptan detection, as well as multiple components detection of methyl mercaptan, water, and methane, simultaneously. |
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| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T07:10:03Z |
| publishDate | 2017-02-01 |
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| series | Sensors |
| spelling | doaj.art-55639ed3614e4518b07d2ac3dcdc89fe2022-12-22T02:56:54ZengMDPI AGSensors1424-82202017-02-0117237910.3390/s17020379s17020379Detection of Atmospheric Methyl Mercaptan Using Wavelength Modulation Spectroscopy with Multicomponent Spectral FittingZhenhui Du0Jiaxin Wan1Jinyi Li2Gang Luo3Hong Gao4Yiwen Ma5State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, ChinaState Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, ChinaKey Laboratory of Advanced Electrical Engineering and Energy Technology, Tianjin Polytechnic University, Tianjin 300387, ChinaState Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, ChinaState Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, ChinaState Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, ChinaDetection of methyl mercaptan (CH3SH) is essential for environmental atmosphere assessment and exhaled-breath analysis. This paper presents a sensitive CH3SH sensor based on wavelength modulation spectroscopy (WMS) with a mid-infrared distributed feedback interband cascade laser (DFB-ICL). Multicomponent spectral fitting was used not only to enhance the sensitivity of the sensor but also to determine the concentration of interferents (atmospheric water and methane). The results showed that the uncertainties in the measurement of CH3SH, H2O, and CH4 were less than 1.2%, 1.7% and 2.0%, respectively, with an integration time of 10 s. The CH3SH detection limit was as low as 7.1 ppb with an integration time of 295 s. Overall, the reported sensor, boasting the merits of high sensitivity, can be used for atmospheric methyl mercaptan detection, as well as multiple components detection of methyl mercaptan, water, and methane, simultaneously.http://www.mdpi.com/1424-8220/17/2/379methyl mercaptan sensordistributed feedback interband cascade laser (DFB-ICL)multicomponent spectral fittingwavelength modulation spectroscopy (WMS)mid-infrared spectroscopy |
| spellingShingle | Zhenhui Du Jiaxin Wan Jinyi Li Gang Luo Hong Gao Yiwen Ma Detection of Atmospheric Methyl Mercaptan Using Wavelength Modulation Spectroscopy with Multicomponent Spectral Fitting Sensors methyl mercaptan sensor distributed feedback interband cascade laser (DFB-ICL) multicomponent spectral fitting wavelength modulation spectroscopy (WMS) mid-infrared spectroscopy |
| title | Detection of Atmospheric Methyl Mercaptan Using Wavelength Modulation Spectroscopy with Multicomponent Spectral Fitting |
| title_full | Detection of Atmospheric Methyl Mercaptan Using Wavelength Modulation Spectroscopy with Multicomponent Spectral Fitting |
| title_fullStr | Detection of Atmospheric Methyl Mercaptan Using Wavelength Modulation Spectroscopy with Multicomponent Spectral Fitting |
| title_full_unstemmed | Detection of Atmospheric Methyl Mercaptan Using Wavelength Modulation Spectroscopy with Multicomponent Spectral Fitting |
| title_short | Detection of Atmospheric Methyl Mercaptan Using Wavelength Modulation Spectroscopy with Multicomponent Spectral Fitting |
| title_sort | detection of atmospheric methyl mercaptan using wavelength modulation spectroscopy with multicomponent spectral fitting |
| topic | methyl mercaptan sensor distributed feedback interband cascade laser (DFB-ICL) multicomponent spectral fitting wavelength modulation spectroscopy (WMS) mid-infrared spectroscopy |
| url | http://www.mdpi.com/1424-8220/17/2/379 |
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