Use of the Elecftrostatic Classification Method to 0 . 1 tm SRM Particles - A Feasibiiiy Study Size

Patrick D. Kinney and The use of the electrostatic classification mance focused on the effect of impuriDavid Y. H. Pui method for sizing monodisperse 0.1 pum ties in the particle-suspending liquid on polystyrene latex (PSL) spheres has the resulting particle diameter. University of Minnesota, been investigated experimentally. The The uncertainty in particle diameter Minneapolis, MN 55455 objective was to determine the feasibility determined by electrical mobility meaof using electrostatic classification as a surements is found to be -3.3% to standard method of particle sizing in the + 3.0%. The major sources of uncerand development of a 0.1 pim particle diametainty include the flow measurement, the ter Standard Reference Material slip correction, and a dependence of George W. Mulholland and (SRM). The mean particle diameter was particle size on the aerosol flow rate. It calculated from a measurement of the was found that the classifier could be Nelson P. Bryner mean electrical mobility of the PSL calibrated to indicate the correct size to spheres as an aerosol using an electrowithin 0.1% for both SRM particle sizes National Institute of Standards static classifier. The performance of the if the defined classification length is deand Technology, classifier was investigated by measuring creased by 1.9%. Gaithersburg, MD 20899 its transfer function, conducting a sensitivity analysis to verify the governing