Incoherent broadband cavity-enhanced absorption spectroscopy in the near-ultraviolet: application to HONO and NO2

Thumbnail Image
Gherman-es017913.pdf(265.23 KB)
Accepted Version
Gherman, Titus
Venables, Dean S.
Vaughan, Stewart
Orphal, Johannes
Ruth, Albert A.
Journal Title
Journal ISSN
Volume Title
American Chemical Society
Published Version
Research Projects
Organizational Units
Journal Issue
The first application of incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) in the near-ultraviolet for the simultaneous detection of two key atmospheric trace species, HONO and NO2, is reported. For both compounds the absorption is measured between 360 and 380 nm with a compact cavity-enhanced spectrometer employing a high power light-emitting diode. Detection limits of similar to 4 ppbv for HONO and similar to 14 ppbv for NO2 are reported for a static gas cell setup using a 20 s acquisition time. Based on an acquisition time of 10 min and an optical cavity length of 4.5 m detection limits of similar to 0.13 ppbv and similar to 0.38 ppbv were found for HONO and NO2 in a 4 m(3) atmospheric simulation chamber, demonstrating the usefulness of this approach for in situ monitoring of these important species in laboratory studies or field campaigns.
Broadband cavity enhanced absorption spectroscopy , IBBCEAS , Atmospheric trace gases
Gherman, T.,Venables, D. S.,Vaughan, S.,Orphal, J., Ruth, A. A.; (2008) 'Incoherent broadband cavity-enhanced absorption spectroscopy in the near-ultraviolet: Application to HONO and NO2'. Environmental Science & Technology, 42 (3):890-895. doi: 10.1021/es0716913
Copyright © 2008 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science & Technology, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see