Journal
CHINESE OPTICS LETTERS
Volume 11, Issue 6, Pages -Publisher
CHINESE LASER PRESS
DOI: 10.3788/COL201311.063001
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Funding
- National Natural Science Foundation of China [61275151, 41275037]
- National 863 Program of China [2009AA063006]
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We describe the application of incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) for in situ measurements of atmospheric NO2 using a blue light-emitting diode. The mirror reflectivity is determined by the transmitted intensity variation through the cavity caused by Rayleigh scattering. Concentrations of atmospheric NO2 (1 to 35 ppbv) during the seven-day period are retrieved from the absorption spectra. The IBBCEAS measurement data are compared with those of a commercial long path differential optical absorption spectroscopy. The linear regression has a correlation coefficient and a slope of 0.983 and 0.975, respectively.
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