A rapidly-swept external-cavity quantum cascade laser with an open-path Herriott cell is used to quantify gas-phase chemical mixtures of D2O and HDO at an update rate of 40 Hz (25 ms measurement time). The chemical mixtures were generated by evaporating D2O liquid near the open-path Herriott cell, allowing the H/D exchange reaction with ambient H2O to produce HDO. Fluctuations in the ratio of D2O and HDO on timescales of
Revised: September 21, 2016 |
Published: May 23, 2016
Citation
Brumfield B.E., M.S. Taubman, and M.C. Phillips. 2016.Rapid and Sensitive Quantification of Isotopic Mixtures Using a Rapidly-Swept External Cavity Quantum Cascade Laser.Photonics 3, no. 2:Article No. 33.PNNL-SA-117042.doi:10.3390/photonics3020033