Record Display for the EPA National Library Catalog

RECORD NUMBER: 30 OF 39

OLS Field Name OLS Field Data
Main Title Particle Transmission Characteristics of an Annular Denuder Ambient Sampling System.
Author Lewis, C. W. ; Ye, Y. ; Tsai, C. J. ; Pui, D. Y. H. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. ;Minnesota Univ., Minneapolis. Particle Technology Lab.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-91/025;
Stock Number PB91-183400
Additional Subjects Air samplers ; Aerosols ; Charged particles ; Air pollution ; Surface properties ; Laboratory tests ; Performance evaluation ; Electrostatics ; Diffusion ; Transmission ; Scattering loss ; Annular nozzles ; Reprints ; Annular denuders
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB91-183400 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/04/1991
Collation 12p
Abstract
Transmission measurements have been performed on University Research Glassware, Inc. model 2000-30B glass annular denuders at 10 L/min using monodisperse particles in the 0.01-1-micrometer diameter size range. Through control of the aerosol charge state, particle losses due to diffusion and electrostatic effects were separately measured and theoretical descriptions of both were developed. For Boltzmann charged (atmospheric) particles in the important 0.1-1-micrometer diameter size range total losses averaged only a few percent or less. Particle transmission measurements also confirmed the design value of 2.5 micrometer for the 50% cutpoint diameter of the URG 2000-30EN cyclone inlet used with these annular denuders. (Copyright (c) 1991 Elsevier Science Publishing Co., Inc.)