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Development of a compact CO2 sensor based on near-infrared laser technology for enological applications


This paper reports the development of an infrared laser spectrometer using commercial diode laser emitting at 2.68 μm. The instrument is designed to measure CO2 concentrations above a glass poured with a sparkling liquid, such as beer or champagne in the present case. This spectrometer was developed in order to realize the cartography of CO2 outgassing in the headspace above various glasses. We provide details of the instrument design and data processing. Absorption lines were carefully selected to minimize interferences from neighboring water vapor transitions. The instrument performance allows to measure ambient CO2 concentrations so that one can be very confident in the CO2 concentrations measurements above the glass. Some preliminary results on sparkling liquids such as beer and champagne are presented and compared to a model describing the flux of CO2 discharging from glasses due to the contribution of bubbles.

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Correspondence to V. Zeninari.

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Mulier, M., Zeninari, V., Joly, L. et al. Development of a compact CO2 sensor based on near-infrared laser technology for enological applications. Appl. Phys. B 94, 725–733 (2009).

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