Partially oxidised organic components in urban aerosol using GCXGC-TOF/MS

Partially oxidised organic components in urban aerosol using GCXGC-TOF/MS

Partially oxidised organic components in urban aerosol using GCXGC-TOF/MS J. Hamilton, P. Webb, A. Lewis, J. Hopkins, S. Smith, and P. Davy Department of Chemistry, University of York, Heslington, York, YO10 5DD, United Kingdom Division of Life Sciences, Kings College London, London, SE1 9NN, United Kingdom Received: 12 January 2004 – Accepted: 24 February 2004 – Published: 9 March 2004 Corresp...

Evaluating the mixing of organic aerosol components using high-resolution aerosol mass spectrometry.

According to the pseudo-ideal mixing assumption employed in practically all chemical transport models, organic aerosol components from different sources interact with each other in a single solution, independent of their composition. This critical assumption greatly affects modeled organic aerosol concentrations, but there is little direct experimental evidence to support it. A main experimenta...

On the Redox Activity of Urban Aerosol Particles: Implications for Size Distribution and Relationships with Organic Aerosol Components

This article presents the distribution of the dithiothreitol-based (DTT) redox activity of water-soluble airborne particulate matter (PM) from two urban sites in the city of Thessaloniki, northern Greece in four size ranges (<0.49, 0.49–0.97, 0.97–3.0 and >3 μm). Seasonal and spatial variations are examined. The correlations of the mass-normalized DTT activity with the content of PM in water-so...

Identification of Trace Organic Components in the CR Chondrites by 4D TOFMS

Characterisation of lightly oxidised organic aerosol formed from the photochemical aging of diesel exhaust particles

The oxidative aging of the semivolatile fraction of diesel exhaust aerosol is studied in order to better understand the influence of oxidation reactions on particle chemical composition. Exhaust is sampled from an idling diesel truck, sent through a denuder to remove gas-phase species and oxidised by hydroxyl (OH ) radicals in a flow reactor. OH concentrations are chosen to approximately match ...