Simultaneous measurement of methylamine in size-segregated aerosols and the gas phase

In order to improve our understanding of the origin and production processes methylamine in atmosphere its contribution particulate WSON, simultaneous measurements size-segregated aerosols gas phase were conducted at a forested site Yamanashi Prefecture, Japan, over one year. The concentration atmospheric that is sum phase, coarse-mode, fine-mode particles was 0.962 ng-N m−3 on average. About 77% detected about 17% phase. Similar seasonal variations found gaseous including higher concentrations recorded summer. relationship between ammonia showed significant positive correlation, suggesting has similar sources with ammonia; for instance, volatilization from soil and/or emission forest biological activities. correlation methylamine, ratio can be an indicator conversion non-sea salt SO42- (nss-SO42-) concentration, converted into through acid-base reaction sulfuric acid nss-SO42-. Significant not obtained comparison excessive amount complete neutralization ammonia, which implies possibility more preferentially reacts than ammonia.