Record Display for the EPA National Library Catalog

RECORD NUMBER: 299 OF 488

OLS Field Name OLS Field Data
Main Title Optical measurements of smoke particle size generated by electric arcs /
Author Chan, P. W.
CORP Author Colorado State Univ., Fort Collins.;National Environmental Research Center, Research Triangle Park, N.C. Control Systems Lab.
Publisher U.S. Environmental Protection Agency,
Year Published 1974
Report Number EPA-650/ 2-74-034; EPA-R-800150
Stock Number PB-236 580
OCLC Number 09624373
Subjects Air--Pollution. ; Smoke.
Additional Subjects Smoke ; Particle size distrubution ; Optical measurement ; Size determination ; Optical instruments ; Light transmission ; Electric arcs ; Lasers ; Smoke generators ; Forward scattering ; Photometry ; Reliability ; Accuracy ; Forward scattering ; Refractivity ; Polarization ; Air pollution ; Particulates
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9101MW4E.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJAD  EPA 650/2-74-034 Region 3 Library/Philadelphia, PA 05/10/1996
EJBD ARCHIVE EPA-650-2-74-034 Headquarters Library/Washington,DC 11/04/2013
EJBD  EPA 650-2-74-034 Headquarters Library/Washington,DC 07/28/2014
EKAM  EPA-650/2-74-034 Region 4 Library/Atlanta,GA 03/14/1997
EKBD  EPA-650/2-74-034 Research Triangle Park Library/RTP, NC 11/16/2016
NTIS  PB-236 580 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation vi, 43 pages : illustrations, charts ; 28 cm
Abstract
The report gives results of a study of the use of light transmission and photometric scattering measurements using lasers for sizing polydispersed metallic particulate systems (often with unknown index of refraction) produced by a dc electric arc smoke generator. The two-angle forward scattering intensity ratio method gives by far the most accurate results: most important, it does not depend on a knowledge of the refractive index. Average size measurements have been obtained with this technique on several metallic and non-metallic particulate systems; the size distribution can also be obtained by computer calculation. The polarization ratio method gives better sensitivity for smaller sub-micron particles (though dependent on refractive index unless forward scattering is used) and has been used successfully to measure size distribution of sub-micron latex spheres. Also discussed is combining the intensity ratio method (at two forward scattering angles) and the polarization ratio method (at one forward angle) for sizing polydispered particulate systems, and developing it into real-time devices for air pollution control.
Notes
EPA 650-2-74-034. June 1974.
Contents Notes
The report gives results of a study of the use of light transmission and photometric scattering measurements using lasers for sizing polydispersed metallic particulate systems (often with unknown index of refraction) produced by a dc electric arc smoke generator. The two-angle forward scattering intensity ratio method gives by far the most accurate results: most important, it does not depend on a knowledge of the refractive index. Average size measurements have been obtained with this technique on several metallic and non-metallic particulate systems; the size distribution can also be obtained by computer calculation. The polarization ratio method gives better sensitivity for smaller sub-micron particles (though dependent on refractive index unless forward scattering is used) and has been used successfully to measure size distribution of sub-micron latex spheres. Also discussed is combining the intensity ratio method (at two forward scattering angles) and the polarization ratio method (at one forward angle) for sizing polydispered particulate systems, and developing it into real-time devices for air pollution control.