ABSTRACT
SGerardJennings (a)Couldyoutellmethebasisforyourassumptionofaninverserelation betweenelectricalmobilityandaerosolmass?(b)Howwasaerosolnumber (ormass)concentrationmeasured?
(a)Asthemassoftheaerosolparticlesincreasestheirbehaviouriscontrolled moreandmorebymechanicalforcesandlessandlessbyelectricalones. Converselysmallions'pathsareinfluencedalmostcompletelybyelectrical forces;thustherelationship(massr112hasbeensuggested.(b)Aerosolmass concentrationwasmeasuredbyaninstrumentcalledaTSIDustTrakwhich hasanominall5).1muppercutoff.Thismassconcentrationwasconverted toanumberconcentrationusinganapproximationforaerosoldensity.
