Ambient aerosol sampling using online mass spectrometry:results from ground-and aircraft based measurements

摘要

Mass spectrometry has proven to be a powerful tool for online,in-situ analysis of the chemical composition of aerosol particles.There are two basic principles that are widely used for ambient particle sampling:While the single particle laser ablation technique allows the qualitative analysis of single particles,the thermal vaporization technique with separate ionisation allows the quantitative analysis of bulk aerosol with high time resolution.In both techniques,the chemical composition is coupled with aerodynamic sizing of the particles,hereby giving chemically speciated size distributions.