Atmospheric measurements in Lyon (France), Valencia (Spain) and Innsbruck (Austria) resulted in complex and clearly distinct POM mass spectra. Between 85 and 95% of the measured mass concentration could be assigned to a chemical composition (CxHyNzOkSl). Detected compounds ranged from pure aliphatic and aromatic hydrocarbons (e.g. pyrene) to highly functionalized oxygenated hydrocarbons (e.g. levoglucosan) of intermediate to low volatility. Data visualization in reduced-parameter frameworks (e.g. carbon oxidation state versus carbon number) revealed the gained analytical advantages by CHARON PTR-TOFMS.
The team also tested the application of Positive Matrix Factorization (PMF) for apportioning sources of atmospheric particulate carbon in late autumn in Innsbruck, Austria. The conserved chemical compositions of known POM marker compounds significantly helped to assign and quantify sources from e.g. biomass burning, traffic, and even cigarette smoking.
The CHARON real-time inlet system for aerosol analysis with PTR-TOFMS has been developed for commercial release in close cooperation between the University of Innsbruck and IONICON. CHARON is now available for selected PTR-TOFMS instruments, exclusively from IONICON. Learn more on the CHARON product website.