Abstract
TECHNIQUES for counting airborne lead particles would be useful in studies of air pollution. No available technique detects lead particles less than 5µ. in diameter, and particles larger than this reside in the atmosphere so briefly that they are probably not a hazard to health. The present methods for measuring lead in the air1 give only the mass of lead per unit volume. The effect on human beings of a particulate suspension cannot be assessed from mass alone, as capture in the lungs depends on particle size2.
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References
Air Pollution Measurements of the National Air Sampling Network: Analyses of Suspended Particulates 1957–1961 (U.S. Public Health Service Publication No. 978, Washington, B.C., 1962).
Davies, C. N., in Inhaled Particles and Vapours (edit. by Davies, C. N.), 82 (Pergamon, New York, 1961).
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Langer, G., Rosinski, J., and Edwards, C. P., J. Atmos. Sci. (in the press).
Rosinski, J., and Parungo, F., J. Appl. Meteorol., 5, 119 (1966).
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MORGAN, G. Technique for Detecting Lead Particles in Air. Nature 213, 58–59 (1967). https://doi.org/10.1038/213058a0
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DOI: https://doi.org/10.1038/213058a0
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