Fiber counting: a source of error corrected

Optical counting of fibers (from a filter sample of industrial air, for example) involves determining how many fibers are within counting fields which are squares of side lengths. It is correct to count all those fibers which are completely within the field and half of those which intersect only one...

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Bibliographic Details
Published inAmerican Industrial Hygiene Association journal Vol. 39; no. 5; p. 362
Main Authors Cooper, D W, Feldman, H A, Chase, G R
Format Journal Article
LanguageEnglish
Published United States 01.05.1978
Subjects
Air Pollutants - analysis
Methods
Monte Carlo Method
Statistics as Topic
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Summary:Optical counting of fibers (from a filter sample of industrial air, for example) involves determining how many fibers are within counting fields which are squares of side lengths. It is correct to count all those fibers which are completely within the field and half of those which intersect only one side. It is shown here to be incorrect to count half those fibers which intersect two sides; the magnitude of this error is calculated, the calculations being verified through a Monte Carlo simulation. The fractional overcount for fibers of length L less than or equal to s is (L/s)2/2pi.
ISSN:0002-8894
2163-369X
DOI:10.1080/0002889778507772