Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy
Molecular oxygen is detected at low concentrations using photoacoustic spectroscopy despite its unfavorable photoacoustic properties. The system consists of a seed laser diode, a tapered amplifier and a quartz tuning fork based spectrophone, thus employing quartz enhanced photoacoustic spectroscopy...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2010-09-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/10/9/8466/ |
| _version_ | 1798041606325010432 |
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| author | Andreas Pohlkötter Michael Köhring Ulrike Willer Wolfgang Schade |
| author_facet | Andreas Pohlkötter Michael Köhring Ulrike Willer Wolfgang Schade |
| author_sort | Andreas Pohlkötter |
| collection | DOAJ |
| description | Molecular oxygen is detected at low concentrations using photoacoustic spectroscopy despite its unfavorable photoacoustic properties. The system consists of a seed laser diode, a tapered amplifier and a quartz tuning fork based spectrophone, thus employing quartz enhanced photoacoustic spectroscopy (QEPAS). With this system a detection limit of 13 ppm is reached with a compact and long term stable setup. Further improvement of the detection limit is possible by adding suitable gases to the sample gas that promote the radiationless de-excitation of the oxygen molecules. |
| first_indexed | 2024-04-11T22:23:51Z |
| format | Article |
| id | doaj.art-844109763b4e46d58f648d9a66c57261 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:23:51Z |
| publishDate | 2010-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-844109763b4e46d58f648d9a66c572612022-12-22T03:59:55ZengMDPI AGSensors1424-82202010-09-011098466847710.3390/s100908466Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic SpectroscopyAndreas PohlkötterMichael KöhringUlrike WillerWolfgang SchadeMolecular oxygen is detected at low concentrations using photoacoustic spectroscopy despite its unfavorable photoacoustic properties. The system consists of a seed laser diode, a tapered amplifier and a quartz tuning fork based spectrophone, thus employing quartz enhanced photoacoustic spectroscopy (QEPAS). With this system a detection limit of 13 ppm is reached with a compact and long term stable setup. Further improvement of the detection limit is possible by adding suitable gases to the sample gas that promote the radiationless de-excitation of the oxygen molecules.http://www.mdpi.com/1424-8220/10/9/8466/Gas sensingphotoacoustic spectroscopyQEPASoxygen sensing |
| spellingShingle | Andreas Pohlkötter Michael Köhring Ulrike Willer Wolfgang Schade Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy Sensors Gas sensing photoacoustic spectroscopy QEPAS oxygen sensing |
| title | Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy |
| title_full | Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy |
| title_fullStr | Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy |
| title_full_unstemmed | Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy |
| title_short | Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy |
| title_sort | detection of molecular oxygen at low concentrations using quartz enhanced photoacoustic spectroscopy |
| topic | Gas sensing photoacoustic spectroscopy QEPAS oxygen sensing |
| url | http://www.mdpi.com/1424-8220/10/9/8466/ |
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