Bibliographic Details
| Title: |
Mineralogy and Morphology of Fibres Determined by Transmission Electron Microscopy and Energy Dispersive Spectroscopy in Steam Tunnels. |
| Authors: |
DUFRESNE, A.1 andre.dufresne@mcgill.ca, INFANTE-RIVARD, C.1 |
| Source: |
Annals of Occupational Hygiene. 2002 Supplement, Vol. 46, p121-124. 4p. |
| Subjects: |
Mineralogy, Transmission electron microscopy, Phase-contrast microscopy, Asbestos, Amphiboles |
| Abstract: |
The objective of this study was to determine the mineralogy and morphology of airborne fibres in steam tunnels by transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) when fibre densities determined by phase contrast optical microscopy (PCOM) ranged from 5 to 100 fibres/mm². The median diameter of chrysotile structures was 0.11 ìm, 0.44 ìm for amphibole and 0.33 ìm for cleavage fragments. The median length of chrysotile structures was 7.7 ìm, 12.7 ìm for amphibole and 8.7 ìm for cleavage fragments. Our results showed that there was poor correlation between PCOM and TEM fibre counts. This is probably explained by the fact that a notable number of chrysotile structures (~50%) detected by TEM had a diameter <0.25 ìm, which is the limit of resolution of a PCOM, and therefore were not seen by the PCOM technique. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
