CO laser absorption coefficients for gases of biological relevance: H2O, CO2, ethanol, acetaldehyde, and ethylene

The pressure-broadened spectra of water vapor, carbon dioxide, ethylene, et hanol, and acetaldehyde were recorded with the use of a liquid nitrogen-coo led CO laser-based photoacoustic spectrometer. The results obtained for CO2 and H2O gases were compared with those from the Hitran database. The absor ption coefficients of ethylene, ethanol, and acetaldehyde on CO laser emiss ion frequencies were determined as well. Finally, the measured spectra were used in a multicomponent analysis of trace gases released by pears (Pyrus communis, cultivar Conference).