Articles | Volume 14, issue 3
Atmos. Meas. Tech., 14, 2429–2439, 2021
https://doi.org/10.5194/amt-14-2429-2021
Atmos. Meas. Tech., 14, 2429–2439, 2021
https://doi.org/10.5194/amt-14-2429-2021

Research article 26 Mar 2021

Research article | 26 Mar 2021

Improvements to a laser-induced fluorescence instrument for measuring SO2 – impact on accuracy and precision

Pamela S. Rickly et al.

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Short summary
Key improvements have been made to an in situ laser-induced fluorescence instrument for measuring SO2 in polluted and pristine environments. Laser linewidth is reduced, rapid laser tuning is implemented, and fluorescence bandpass filters are optimized. These improvements have led to a 50 % reduction in instrument detection limit. The influence of aromatic compounds was also investigated and determined to not bias SO2 measurements.