An LED-based cavity-enhanced absorption spectrometer detects SO2 in ambient air at 0.75 ppbv (5 min, 3-sigma), validated against a fluorescence reference monitor with slope 1.04.
Integrated Science Assessment for Sulfur Oxides-Health Criteria ; Technical Report EPA-HQ-ORD-2013-0357; U.S
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Detection of Sulfur Dioxide by Broadband Cavity-Enhanced Absorption Spectroscopy (BBCEAS)
An LED-based cavity-enhanced absorption spectrometer detects SO2 in ambient air at 0.75 ppbv (5 min, 3-sigma), validated against a fluorescence reference monitor with slope 1.04.