Record Display for the EPA National Library Catalog


Main Title Amphibole Fiber Concentration Determination for a Series of Community Air Samples: Use of X-Ray Diffraction to Supplement Electron Microscope Analysis.
Author Cook, P. M. ; Smith, P. L. ; Wilson, D. G. ;
CORP Author Environmental Research Lab.-Duluth, MN.
Year Published 1978
Report Number EPA/600/J-78/059;
Stock Number PB-289 183
Additional Subjects Amphiboles ; Gas analysis ; Asbestos ; Air pollution ; Concentration(Composition) ; Chemical analysis ; X ray analysis ; X ray diffraction ; Electron microscopy ; Samples ; Air pollution detection ; Reprints
Library Call Number Additional Info Location Last
NTIS  PB-289 183 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 15p
The accurate measurement of annual average mineral fiber concentrations at various air sampling sites provides the best index of non-occupational inhalation exposure to fibers in a community located near an industrial source of airborne amphibole fibers. The transmission electron microscope analysis of enough individual high volume air samples to provide annual average fiber concentrations is not feasible because of the great time and expense required. X-ray diffraction analysis of air samples collected on membrane filters over periods of several days offers a reliable measurement of amphibole mineral mass concentration. An excellent linear correlation (r = 0.94 for N = 12) exists between the amphibole mass concentrations (x-ray diffraction) and amphibole fiber concentrations (transmission electron microscope). The correlation equation is used to calculate amphibole fiber concentrations from over 300 x-ray diffraction analyses. The accuracy and precision of both techniques are discussed as well as particle concentration variations influenced by meteorology, emission sources, and sampling location.