Record Display for the EPA National Library Catalog


Main Title Evaluation of Portable X-ray Fluorescence Spectrometer for Measurement of Lead in Paint, Soil and Dust.
Author Hardison, D. L. ; Whitaker, C. O. ; Neefus, J. D. ; Estes, E. D. ; Gutnecht, W. F. ;
CORP Author Research Triangle Inst., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher 1992
Year Published 1992
Report Number EPA-68-02-4550; EPA/600/A-92/245;
Stock Number PB93-121010
Additional Subjects Lead(Metal) ; Paints ; X ray spectroscopy ; Fluorescence ; Quality assurance ; Precision ; Accuracy ; Standards ; Quantitative analysis ;
Library Call Number Additional Info Location Last
NTIS  PB93-121010 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 11p
Three widely used commercially available portable X-ray fluorescence spectrometers were evaluated for precision and accuracy of measurement of lead in paint. Included were two direct reading instruments and one spectrum analyzer. Test materials were prepared by spiking oil-based and latex paint with white lead and casting the paint into films. The films were then placed on various substrates including wood, plasterboard, metal and concrete and the lead measured using the spectrometers that had been precalibrated by the manufacturers. The overall best results were generally attained with the wood and plasterboard substrates. Using the K shell X-rays, a typical linear range of 0.2 to 10.0 mg sq cm was found. Precisions achieved were 0.1-0.3 mg Pb/sq cm with the laboratory standards. At 1.0 mg Pb/sq cm, bias varied from about -0.4 to +0.3 mg Pb/sq cm. The L shell X-rays were shown to be attenuated by multiple layers of paint as is typically found in older dwellings.