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Issue 8, 2006
From the journal:

Analyst

A compact broadband cavity enhanced absorption spectrometer for detection of atmospheric NO2 using light emitting diodes†

Justin M. Langridge,a   Stephen M. Ball*b  and  Roderic L. Jonesa  

* Corresponding authors

a Department of Chemistry, University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge, UK

b Department of Chemistry, University of Leicester, University Road, Leicester, UK
E-mail: sb263@leicester.ac.uk
Fax: +44 (0)116 252 3789
Tel: +44 (0)116 252 2139

Abstract

A compact and low power detector has been developed for the in situ measurement of atmospheric NO2 using broadband cavity enhanced absorption spectroscopy. Absorption by the O2–O2 collisional pair was used to determine the cavity mirror reflectivity, thus enabling the retrieval of absolute absorber concentrations by differential spectral fitting techniques. Quantitative amounts of ambient NO2 (between 3 and 32 parts per billion) were retrieved from spectra recorded in the presence of ambient aerosol with statistical uncertainties approaching 100 ppt for a 60 s averaging period. The instrument's response was compared to that of a commercial chemiluminescence detector and was found to agree to within 6%.

Graphical abstract: A compact broadband cavity enhanced absorption spectrometer for detection of atmospheric NO2 using light emitting diodes

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Article information

DOI
https://doi.org/10.1039/B605636A
Article type
Paper
Submitted
20 Apr 2006
Accepted
13 Jun 2006
First published
04 Jul 2006

Analyst, 2006,131, 916-922

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A compact broadband cavity enhanced absorption spectrometer for detection of atmospheric NO2 using light emitting diodes

J. M. Langridge, S. M. Ball and R. L. Jones, Analyst, 2006, 131, 916 DOI: 10.1039/B605636A

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