Ammonia and ethene absorption measurements with a tunable CO2-laser-based photoacoustic trace gas detector

Simona M. Cristescu; Dan C. Dumitras; Doru C. A. Dutu

doi:10.1117/12.378194

25 February 2000 Ammonia and ethene absorption measurements with a tunable CO₂-laser-based photoacoustic trace gas detector

Simona M. Cristescu, Dan C. Dumitras, Doru C. A. Dutu

Author Affiliations +

Proceedings Volume 4070, ALT '99 International Conference on Advanced Laser Technologies; (2000) https://doi.org/10.1117/12.378194
Event: ALT'99 International Conference: Advanced Laser Technologies, 1999, Potenza-Lecce, Italy

Abstract

During the last years, the development of optical spectroscopic techniques have made possible measurements of weak IR absorption lines of many gases with biological, agricultural and environmental interest. An extracavity configuration for trace gas detection, based on CO₂ laser photoacoustic spectroscopy is discussed. We show the use of this system to determine the absorption spectra of ammonia and ethene for diluted absorber-nitrogen mixtures of 13 ppm at 54 different CO₂ laser wavelengths. Due to specific features of the experimental system, the result reported in literature present significant differences for some important spectral lines. The measurements were performed at room temperature and atmospheric pressure. In addition,the detection limits of C₂H₄NH₃ and O₃ were calculated.

Citation Download Citation

Simona M. Cristescu, Dan C. Dumitras, and Doru C. A. Dutu "Ammonia and ethene absorption measurements with a tunable CO₂-laser-based photoacoustic trace gas detector", Proc. SPIE 4070, ALT '99 International Conference on Advanced Laser Technologies, (25 February 2000); https://doi.org/10.1117/12.378194

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