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Carbon dioxide laser absorption spectra and low ppb photoacoustic detection of hydrazine fuels

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Abstract

Absorption cross-section data are reported for the toxic rocket fuels hydrazine, monomethylhydrazine, and unsymmetrical dimethylhydrazine (UDMH), as well as for their selected air oxidation products dimethylamine, trimethylamine, and methanol at up to seventy-eight CO2 laser wavelengths each. These data are important for the assessment of the capability of CO2 laser-based spectroscopic techniques for monitoring low levels of hydrazine-fuel vapors in the ambient air. Interference-free detection sensitivities of <30 ppb have been demonstrated for UDMH using a laboratory photoacoustic detection system.

© 1980 Optical Society of America

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