Development of novel experimental methods and calculations for the determination and optimization of the response time of a photoacoustic gas analyser
Monitoring and controlling of short-term physico-chemical processes frequently require gas analyzers with high time resolution. The scope of the present study was to shorten the response time of the longitudinal-differential cell-based photoacoustic systems. Finite element analysis and visual invest...
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| Dokumentumtípus: | Könyv része |
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2019
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| Sorozat: | Proceedings of the International Symposium on Analytical and Environmental Problems
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| Kulcsszavak: | Analitikai kémia |
| Online Access: | http://acta.bibl.u-szeged.hu/64907 |
| Tartalmi kivonat: | Monitoring and controlling of short-term physico-chemical processes frequently require gas analyzers with high time resolution. The scope of the present study was to shorten the response time of the longitudinal-differential cell-based photoacoustic systems. Finite element analysis and visual investigation of the gas flow were used to improve the purge of the gas sample through the photoacoustic cell. A diffuser providing quick purging was attached to the first buffer of the cell. The optimization of the measurement parameters (including temperature, tube materials, flow rate) and the use of the diffuser resulted in a reduced response time, which was found to be around 1 second. In addition, response time characteristics was determined by measurement of instantaneous injection of analyte. |
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| Terjedelem/Fizikai jellemzők: | 461-464 |
| ISBN: | 978-963-306-702-4 |