Articles | Volume 9, issue 10
https://doi.org/10.5194/amt-9-4891-2016
https://doi.org/10.5194/amt-9-4891-2016
Research article
 | 
06 Oct 2016
Research article |  | 06 Oct 2016

An automated online instrument to quantify aerosol-bound reactive oxygen species (ROS) for ambient measurement and health-relevant aerosol studies

Francis P. H. Wragg, Stephen J. Fuller, Ray Freshwater, David C. Green, Frank J. Kelly, and Markus Kalberer

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Short summary
A new portable, online instrument was designed, built and characterised to quantify reactive oxygen species (ROS) in atmospheric aerosols for laboratory and field deployment. ROS are potentially major contributors to the toxicity of particles. Our new instrument allows automated quantification of ROS over days with a detection limit of about 4 nmol [H2O2] equivalents per cubic metre of air, allowing for continuous atmospheric measurements of this important aerosol toxicity parameter.