Record Display for the EPA National Library Catalog


Main Title Particulate sizing techniques for control device evaluation : cascade impactor calibrations /
Author Cushing, Kenneth M., ; Lacey, George E. ; McCain, Joseph D. ; Smith., Wallace B.
CORP Author Southern Research Inst., Birmingham, Ala.;Industrial Environmental Research Lab., Research Triangle Park, N.C.
Publisher Environmental Protection Agency, Office of Research and Development ; For sale by the National Technical Information Service,
Year Published 1976
Report Number EPA 600-2-76-280; EPA-68-02-0273; EPA-ROAP-21ADM-011
Stock Number 22161
OCLC Number 04062277
ISBN pbk.
Subjects Calibration ; Dust control ; Measurement ; measuring ; Mensuration
Additional Subjects Impactors ; Particle sizes ; Air pollution control equipment ; Calibrating ; Efficiency ; Performance evaluation ; Aerosols ; Parameters ; Graphic methods ; Concentration(Composition) ; Field tests ; Experimental design ; Cascade impactors
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-2-76-280 c.1 Headquarters Library/Washington,DC 03/31/2014
EKBD  EPA-600/2-76-280 Research Triangle Park Library/RTP, NC 06/20/2003
ELBD ARCHIVE EPA 600-2-76-280 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ESAD  EPA 600-2-76-280 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-262 849 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xiv, 79 pages : illustrations ; 28 cm.
The report gives results of a calibration study to determine sizing parameters and wall losses for five commercially available cascade impactors. A vibrating-orifice aerosol generator was used to produce monodisperse ammonium fluorescein aerosol particles 15 to 1 micrometers in diameter. A pressurized Collison Nebulizer system was used to disperse Dow Corning polystyrene latex (PSL) spheres 2 to 0.46 millimeters in diameter. When ammonium fluorescein was used, the mass collected by each impactor surface was determined using absorption spectrophotometry of washes from the various surfaces. When sizing with the PSL spheres, a Climet Instruments Model 208A Particle Analyzer was used to determine particle number concentrations at the inlet and the outlet of the test impactor. Results are reported showing stage collection efficiency as a function of the square root of the Stokes number, stage collection efficiency as a function of particle size, and impactor wall losses (total, nozzle, and inlet cone) as a function of particle size. It has been determined that the values of the Stokes number for the 50% collection efficiency are not generally the same for each impactor stage. A table of these values is presented. Published theories do not successfully predict these values, so empirical calibration is required before these devices can be used accurately in the field or laboratory.
Contract no. 68-02-0273, ROAP no. 21ADM-011, program element no. 1AB012. Issued Oct. 1976. Includes bibliographical references (page 78).