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A new method of rapidly measuring the oil droplet size distribution of an oil fog

Authors
Journal
Atmospheric Environment (1967)
0004-6981
Publisher
Elsevier
Publication Date
Volume
2
Issue
2
Identifiers
DOI: 10.1016/0004-6981(68)90027-9

Abstract

Abstract The Goetz ultracentrifuge was utilized to sample a polydispersed air suspension of oil droplets ranging in size from 0.1 μ to 3 μ in dia. The usual evaluation of a Goetz sample, which consists of enumerating individual particles on the instrument's chrome-plated collecting foil, was not applicable since the droplets wetted the surface of the foil and formed a continuous oil film. By employing the phenomena of thin film interference of light, the thickness contours of the oil film were established and the size distribution of the oil droplets deduced. With this new technique, the distribution can be found within minutes for oil fogs whose densities are larger than 2 mg of oil/m 3 of air, and with an accuracy of approximately one per cent of the droplet sizes involved.

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