Quantum Cascade Laser-Based Photoacoustic Sensor for Trace Detection of Formaldehyde Gas
We report on the development of a photoacoustic sensor for the detection of formaldehyde (CH2O) using a thermoelectrically cooled distributed-feedback quantum cascade laser operating in pulsed mode at 5.6 mm. A resonant photoacoustic cell, equipped with four electret microphones, is excited in its f...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2009-04-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/9/4/2697/ |
| _version_ | 1811184525468762112 |
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| author | Pietro Mario Lugarà Gaetano Scamarcio Vincenzo Spagnolo Cinzia Di Franco Angela Elia |
| author_facet | Pietro Mario Lugarà Gaetano Scamarcio Vincenzo Spagnolo Cinzia Di Franco Angela Elia |
| author_sort | Pietro Mario Lugarà |
| collection | DOAJ |
| description | We report on the development of a photoacoustic sensor for the detection of formaldehyde (CH2O) using a thermoelectrically cooled distributed-feedback quantum cascade laser operating in pulsed mode at 5.6 mm. A resonant photoacoustic cell, equipped with four electret microphones, is excited in its first longitudinal mode at 1,380 Hz. The absorption line at 1,778.9 cm-1 is selected for CH2O detection. A detection limit of 150 parts per billion in volume in nitrogen is achieved using a 10 seconds time constant and 4 mW laser power. Measurements in ambient air will require water vapour filters. |
| first_indexed | 2024-04-11T13:14:39Z |
| format | Article |
| id | doaj.art-55102981b0554c6fac463d710add7238 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:14:39Z |
| publishDate | 2009-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-55102981b0554c6fac463d710add72382022-12-22T04:22:27ZengMDPI AGSensors1424-82202009-04-01942697270510.3390/s90402697Quantum Cascade Laser-Based Photoacoustic Sensor for Trace Detection of Formaldehyde GasPietro Mario LugaràGaetano ScamarcioVincenzo SpagnoloCinzia Di FrancoAngela EliaWe report on the development of a photoacoustic sensor for the detection of formaldehyde (CH2O) using a thermoelectrically cooled distributed-feedback quantum cascade laser operating in pulsed mode at 5.6 mm. A resonant photoacoustic cell, equipped with four electret microphones, is excited in its first longitudinal mode at 1,380 Hz. The absorption line at 1,778.9 cm-1 is selected for CH2O detection. A detection limit of 150 parts per billion in volume in nitrogen is achieved using a 10 seconds time constant and 4 mW laser power. Measurements in ambient air will require water vapour filters.http://www.mdpi.com/1424-8220/9/4/2697/FormaldehydeQuantum cascade laserPhotoacoustic spectroscopyTrace gas sensor |
| spellingShingle | Pietro Mario Lugarà Gaetano Scamarcio Vincenzo Spagnolo Cinzia Di Franco Angela Elia Quantum Cascade Laser-Based Photoacoustic Sensor for Trace Detection of Formaldehyde Gas Sensors Formaldehyde Quantum cascade laser Photoacoustic spectroscopy Trace gas sensor |
| title | Quantum Cascade Laser-Based Photoacoustic Sensor for Trace Detection of Formaldehyde Gas |
| title_full | Quantum Cascade Laser-Based Photoacoustic Sensor for Trace Detection of Formaldehyde Gas |
| title_fullStr | Quantum Cascade Laser-Based Photoacoustic Sensor for Trace Detection of Formaldehyde Gas |
| title_full_unstemmed | Quantum Cascade Laser-Based Photoacoustic Sensor for Trace Detection of Formaldehyde Gas |
| title_short | Quantum Cascade Laser-Based Photoacoustic Sensor for Trace Detection of Formaldehyde Gas |
| title_sort | quantum cascade laser based photoacoustic sensor for trace detection of formaldehyde gas |
| topic | Formaldehyde Quantum cascade laser Photoacoustic spectroscopy Trace gas sensor |
| url | http://www.mdpi.com/1424-8220/9/4/2697/ |
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