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Updated: Dec 5, 2025

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
Broadband Laser-Based Infrared Detector for Gas Chromatography
Teemu Tomberg1, Niko Vuorio1, Tuomas Hieta2
1Department of Chemistry, University of Helsinki, P.O. Box 55, FI-00014 Helsinki, Finland.
Abstract:
Cantilever-enhanced photoacoustic spectroscopy coupled with gas chromatography is used to quantitatively analyze a mixture of alcohols in a quasi-online manner. A full identification and quantification of all analytes are achieved based on their spectral fingerprints using a widely tunable continuous-wave laser as a light source. This can be done even in the case of interfering column/septum bleed or simultaneously eluted peaks. The combination of photoacoustic spectroscopy and gas chromatography offers a viable solution for compact and portable instruments in applications that require straightforward analyses with no consumables.
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