Record Display for the EPA National Library Catalog


Main Title Quantitative X-Ray Powder Diffraction Analysis of Air Particulate Samples.
Author Thompson, Albert C. ; Johnson, L. R. ; Jaklevic, J. M. ;
CORP Author California Univ., Berkeley. Lawrence Berkeley Lab.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1983
Report Number EPA-600/D-83-023;
Stock Number PB83-178202
Additional Subjects Air pollution ; Particles ; X ray diffraction ; Gas detectors ; X ray analysis ; Samples ; Aerosols ; Nondestructive tests ; Laboratory equipment ; Particle size ; Calibrating ; Design criteria ; Performance evaluation ; Air pollution detection
Library Call Number Additional Info Location Last
NTIS  PB83-178202 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 13p
The design, operation and calibration of an x-ray powder diffraction system for the analysis of air particulate samples are described. The instrument analyzes a sample non-destructively for its major crystalline components. The system has been optimized for the non-destructive analysis of major crystalline species deposited on samples collected with dichotomous air samplers. It includes a position-sensitive detector for increased sensitivity and a small computer for rapid on-line data analysis. A calibration procedure has been developed to give direct quantitative measurements of the primary chemical compounds on the sample. This system was used to analyze 18 pairs of samples of the Houston aerosol. The results of this analysis when combined with the measurement of the elemental concentrations by XRF analysis give additional discrimination in source receptor models.