Record Display for the EPA National Library Catalog


Main Title A Data reduction system for cascade impactors /
Author McCain, J. D. ; Clinard, G. I. ; Felix, L. G. ; Johnson., J. W. ;
Other Authors
Author Title of a Work
McCain, Joseph D.
CORP Author Southern Research Inst., Birmingham, Ala.;Industrial Environmental Research Lab., Research Triangle Park, N.C.
Publisher U.S. Environmental Protection Agency, Industrial Environmental Research Laboratory ; National Technical Information Service [distributor,
Year Published 1978
Report Number EPA-600/7-78-132a; SORI-EAS-78-331; EPA-68-02-2131
Stock Number PB-283 173
OCLC Number 08277221
Subjects Flue gases--Measurement--Data processing ; Particles--Measurement--Data processing
Additional Subjects Air pollution ; Particle size distribution ; Data reduction ; Impactors ; Fortran ; Data analysis ; Computer programming ; Numerical analysis ; Sampling ; Cascade impactors ; Cascade impactor data reduction system ; Air pollution sampling
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA-600/7-78-132a Research Triangle Park Library/RTP, NC 12/05/2003
ELBD ARCHIVE EPA 600-7-78-132a Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ESAD  EPA 600-7-78-132A Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-283 173 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vii, 35 p. : ill. ; 28 cm.
The report describes a computer-based data reduction system for cascade impactors. The system utilizes impactor-specific calibration information, together with operating conditions and other pertinent information (e.g., stage weights, sampling duration), to determine particle size distributions in several forms for individual runs. The program can handle all commercial round-jet cascade impactors, including common modifications, which are in current use in stack sampling. Other round-jet impactors can be easily substituted. Slotted impactors could be accommodated with slight program revision. A spline technique is applied to fit a curve in the cumulative size distribution obtained from each individual impactor run. The fitted curves have forced continuity in coordinates and slopes. Size distribution averages for multiple runs are made using the fitted curves for interpolation at consistent particle diameters, regardless of the diameters at which the data points fall in the original individual run data sets. After statistical analyses to locate and remove outliers from the data being averaged, variances, standard deviations, and confidence intervals are calculated. The averages and statistical information are available in tables and graphs in several size distribution formats. Averaged data are stored on disks for subsequent use.
"Southern Research Institute." "July 1978." Bibliography: p. 35. "Contract no. 68-02-2131, T.D. 10101, program element no. EHE624."