Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/93569
Type: Artigo de evento
Title: A Photoacoustic Spectrometer For Trace Gas Detection
Author: Telles E.M.
Bezerra E.
Scalabrin A.
Abstract: A high-resolution external laser photoacoustic spectrometer has been developed for trace gas detection with absorption transitions in coincidence with CO 2 laser emission lines (9,2-10,9 μm: 920-1086 cm -1). The CO 2 laser operates in 90 CW lines with power of up to 15 W. A PC-controlled step motor can tune the laser lines. The resonance frequency of first longitudinal mode of the photoacoustic cell is at 1600 Hz. The cell Q-factor and cell constant are measured close to 50 and 28 mVcmW -1 respectively. The spectrometer has been tested in preliminary studies to analyze the absorption transitions of ozone (O 3). The ethylene (C 2H 4 from papaya fruit is also investigated using N 2 as carrier gas at a constant flow rate. © EDP Sciences.
Editor: 
Rights: aberto
Identifier DOI: 10.1051/jp4:2005125205
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-33645095240&partnerID=40&md5=50c4e38eb1555f7535bd9e8e1dd27208
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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