Title: Beyond particle mobility classifiers: Classifying particles by mass or relaxation time 

THURSDAY, MAY, 12, 2022 11:00AM-11:50AM

Abstract: Mobility classifiers, like the differential mobility analyzer (DMA), have been used for decades to separate polydisperse aerosols into classes so that the particles can be counted or otherwise measured by another instrument. The DMA is routinely used to measure particle count distributions or generate a “monodisperse” aerosol. More recently, classifiers have been developed to classify particles by their massto-charge ratio (centrifugal particle mass analyzers, CPMA) or relaxation time (aerodynamic aerosol classifier, AAC). This presentation will describe the operating principles behind the CPMA and AAC and show how they can be used in applications where a DMA is not suitable or how they can be used in tandem
with other instruments.