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A Laser Microphotometer for Determining Uniformity of Particulate Deposits on Membrane Filters
Volume 30, Number 3 (June 1976) Page 289-290
Kuehner, Edwin C.; Cassatt, Wayne A.
An apparatus for determining the uniformity of a layer of fine particles deposited on a membrane filter is described. A transmission scan of a laser beam across the filter deposit is a measure of the uniformity of the deposit layer. Quantitative estimates, with an accuracy of approximately 10%, of areal densities are inferred by calibration against reference deposits of ground orchard leaves on membrane filters.