Record Display for the EPA National Library Catalog


Main Title X-ray analysis of airborne asbestos : interim report : sample preparation /
Author Fatemi, Mohammed. ; Johnson, E. T. ; Whitlock, R. R. ; Birks, L. S. ; Gilfrich., J. V.
Other Authors
Author Title of a Work
Fatemi, M.
Johnson, E. T.
Whitlock, R. R.
Birks, LaVerne Stanfield,
Gilfrich, John V.
CORP Author Naval Research Lab., Washington, D.C.;Environmental Sciences Research Lab., Research Triangle Park, N.C. Emissions Measurement and Characterization Div.
Publisher U.S. Environmental Protection Agency, Environmental Sciences Research Laboratory,
Year Published 1976
Report Number EPA 600/2-77/062
Stock Number PB-266 671
OCLC Number 40388269
Subjects X-ray spectroscopy ; Asbestos ; Air--Pollution--Measurement
Additional Subjects Asbestos ; X ray diffraction ; Aerosols ; X ray analysis ; Alignment ; Air pollution ; Air filters ; Feasibility ; Fibers ; Concentration(Composition) ; Design criteria ; Chemical analysis ; Gas analysis ; Air pollution detection
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-2-77-062 Headquarters Library/Washington,DC 09/15/2014
EJBD  EPA 600-2-77-062 Headquarters Library/Washington,DC 10/31/2016
EKBD  EPA-600/2-77-062 Research Triangle Park Library/RTP, NC 06/20/2003
ERAD  EPA 600/2-77-062 Region 9 Library/San Francisco,CA 09/17/2012
ESAD  EPA 600-2-77-062 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-266 671 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation v, 30 pages : illustrations ; 28 cm
A measurement technique, suitable for submicrogram quantities of asbestos, using a combination of fiber alignment and x-ray diffraction was previously introduced. The x-ray measurement of aligned fibers is a straightforward operation. However, it has since been found that the sample preparation itself depends on several parameters which need critical control. The composition of the alignment medium is established as 10-20 ppm (W/V) of parlodion (cellulose nitrate) in distilled amyl acetate. The effect of filter pore-size has been shown to be more significant than previously thought. Fiber losses in the range of 50-80% of total mass are not unlikely, depending on the fiber size distribution. Similarly, ultrasonification has been shown to affect fiber size distribution and subsequent fiber retention by filters. Ambient relative humidity suitable for alignment of single drops has been established to be in the range of 35% to 45% at 22C to 20C, respectively. Parameters involved in radio frequency ashing of filters are also discussed. It is shown that ashing quality and subsequent dispersion depends on the filter membrane, and improves as this concentration is increased.
Interagency agreement EPA-IAG-D6-0651. "EPA project officer: Jack Wagman." Includes bibliographical references (page 29). "EPA-600/2-77-062."