Open AccessAn exchange of membrane filter samples of airborne asbestos between one United Kingdom and three Scandinavian laboratories.
Author(s) -
Stephen T. Beckett,
B Gylseth,
Staffan Krantz,
Irene M Paris,
Thomas Schneider
Publication year - 1979
Publication title -
scandinavian journal of work, environment and health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.621
H-Index - 103
eISSN - 1795-990X
pISSN - 0355-3140
DOI - 10.5271/sjweh.2667
Subject(s) - asbestos , chrysotile , membrane filter , filter (signal processing) , clearing , kingdom , chemistry , business , engineering , materials science , membrane , metallurgy , geology , finance , paleontology , biochemistry , electrical engineering
An asbestos fiber counting trial based on the postal exchange of mounted and unmounted membrane filter samples was conducted between laboratories in Denmark, Norway, Sweden and the United Kingdom. The exchange was organized on the same basis as a previous international exchange involving nine countries (5); the United Kingdom laboratory had also participated in the previous exchange. Differences in counting techniques were distinguished from those due to the method used to make the filter transparent. Counting techniques gave rise to the biggest differences, giving a ratio of highest to lowest count of 2.75 for amphibole and 3.2 for chrysotile asbestos slides. A comparison was also made with the results of the previous international trial; it was made possible by the recounting of some of the slides from this exchange. Serious deterioration over two years was found in all slides except those mounted with the acetone/triacetin method.