Interactive comment on “Field characterization of the PM2.5 Aerosol Chemical Speciation Monitor: insights into the composition, sources and processes of fine particles in Eastern China” by

This data shows a comparison of ACSM data in Nanjing between a traditional PM1 instrument and a new PM2.5 instrument equipped with a capture vaporiser (CV), along with other instruments. These two modifications to the instrument design have been heavily anticipated for the purposes of comparability with other PM2.5 measurements and to get away from the ‘bounce’ artefacts that are corrected for using empirical functions. While technical in scope, the paper purports to also offer some scientific insight to atmospheric processes at this site, so is suitable for ACP. However, I do have a misgiving on how the differences between the two instruments is interpreted (see below),