Karsa’s MION2 Orbitrap chemical ionization mass spectrometer (CIMS) addresses this challenge by combining ultra-high mass resolution with flexible, real-time ionization strategies. Capable of resolving isobaric and isotopically substituted compounds at sub-pptv levels, the system enables continuous, in situ detection of organonitrates under both laboratory and ambient conditions. Recent demonstrations show robust, humidity-independent performance, capturing oxidation products of α-pinene in controlled experiments and revealing diurnal cycles of organonitrates in Helsinki’s urban atmosphere.
With its sensitivity, selectivity, and adaptability, the MION2 Orbitrap CIMS provides scientists with a reliable platform for investigating oxidation chemistry in the atmosphere—from mechanistic studies to real-world field campaigns.
