You are here:
EVALUATION OF PORTABLE X-RAY FLUORESCENCE SPECTROMETER FOR MEASUREMENT OF LEAD IN PAINT, SOIL AND DUST
Citation:
Hardison, D., J. Neefus, E. Estes, W. Gutknecht, S. Harper, M. Beard, AND D. Lehmden. EVALUATION OF PORTABLE X-RAY FLUORESCENCE SPECTROMETER FOR MEASUREMENT OF LEAD IN PAINT, SOIL AND DUST. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-92/245.
Description:
Three widely used commercially available portable X-ray fluorescence spectrometers were evaluated for precision and accuracy of measurement of lead in paint. ncluded were two direct reading instruments and one spectrum analyzer. est materials were prepared by spiking oil-based and latex paint with white lead and casting the paint into films. he 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. he overall best results were generally attained with the wood and plasterboard substrates. sing the K shell X-rays, a typical linear range of 0.2 to 10.0 mg. m2 was found. recisions achieved were 0.1-0.3 mg Pb/cm2 with the laboratory standards. t 1.0 mg Pb/cm2, bias varied from about -0.4 to +0.3 mg Pb/cm2. he L shell X-rays were showen to be attenuated by multiple layers of paint as is typically found in older dwellings. his paper has been reviewed in accordance with the U.S. Environmental Protection Agency peer and administration review policies and approved for presentation and publication. ention of trade names or commercial products does not constitute endorsement or recommendation for use.