Determination of N2O isotopomers with quantum cascade laser based absorption spectroscopy

Abstract

We present an analytical technique based on direct absorption laser spectroscopy for high precision and simultaneous determination of the mixing ratios of the most abundant nitrous oxide isotopic species: 14N15N16O, 15N14N16O and 14N2 16O. A precision of 0.5‰ was achieved for the site specific isotope ratios of N2O at 90 ppm using an averaging time of 300 s. ©2008 Optical Society of America