Infrared spectral evaluation of methanol/ammonia vapor mixtures

Paul E. Field; Roger J. Combs

doi:10.1117/12.565164

16 December 2004 Infrared spectral evaluation of methanol/ammonia vapor mixtures

Paul E. Field, Roger J. Combs

Proceedings Volume 5585, Chemical and Biological Point Sensors for Homeland Defense II; (2004) https://doi.org/10.1117/12.565164
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

Abstract

Vapor analytes of methanol and ammonia are quantitatively generated separately and as mixtures in the presence of water vapor. Generation of these analytes relies on the vapor liquid equilibria properties of associated aqueous solutions for delivering targeted vapor amounts into an equilibrium vapor cell. Gravimetric solution preparation and maintaining a constant solution temperature permits control of the analyte amount that is delivered to the optical equilibrium vapor cell. A laboratory Fourier transform infrared spectrometer examines the fixed path length optical cell contents. This examination furnishes vapor-phase infrared absorbances for analyte mixtures in the Beer's Law concentration range. Literature vapor liquid equilibrium data and infrared absorbance measurements show that the methanol/ammonia binary compontents of the ternary aqueous solutions of this study exhibit ideal solution behavior.

Citation Download Citation

Paul E. Field and Roger J. Combs "Infrared spectral evaluation of methanol/ammonia vapor mixtures", Proc. SPIE 5585, Chemical and Biological Point Sensors for Homeland Defense II, (16 December 2004); https://doi.org/10.1117/12.565164

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