Articles | Volume 8, issue 4
Atmos. Meas. Tech., 8, 1835–1862, 2015
https://doi.org/10.5194/amt-8-1835-2015

Special issue: Marine trace gases and aerosols over tropical oceans (AMT/ACP...

Atmos. Meas. Tech., 8, 1835–1862, 2015
https://doi.org/10.5194/amt-8-1835-2015

Research article 23 Apr 2015

Research article | 23 Apr 2015

Instrument intercomparison of glyoxal, methyl glyoxal and NO2 under simulated atmospheric conditions

R. Thalman et al.

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Short summary
Measurements of α-dicarbonyl compounds, like glyoxal (CHOCHO) and methyl glyoxal (CH3C(O)CHO), are informative about the rate of hydrocarbon oxidation, oxidative capacity, and secondary organic aerosol (SOA) formation in the atmosphere. We have compared nine instruments and seven techniques to measure α-dicarbonyl, using simulation chamber facilities in the US and Europe. We assess our understanding of calibration, precision, accuracy and detection limits, as well as possible sampling biases.