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Mineralogy and Morphology of Fibres Determined by Transmission Electron Microscopy and Energy Dispersive Spectroscopy in Steam Tunnels.

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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]
Copyright of Annals of Occupational Hygiene is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: Mineralogy and Morphology of Fibres Determined by Transmission Electron Microscopy and Energy Dispersive Spectroscopy in Steam Tunnels.
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  Data: 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/mm&#178;. The median diameter of chrysotile structures was 0.11 &#236;m, 0.44 &#236;m for amphibole and 0.33 &#236;m for cleavage fragments. The median length of chrysotile structures was 7.7 &#236;m, 12.7 &#236;m for amphibole and 8.7 &#236;m 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 &lt;0.25 &#236;m, 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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  Data: &lt;i&gt;Copyright of Annals of Occupational Hygiene is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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        Value: 10.1093/annhyg/46.suppl_1.121
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        Text: English
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      – SubjectFull: Transmission electron microscopy
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      – SubjectFull: Phase-contrast microscopy
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      – SubjectFull: Asbestos
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      – SubjectFull: Amphiboles
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      – TitleFull: Mineralogy and Morphology of Fibres Determined by Transmission Electron Microscopy and Energy Dispersive Spectroscopy in Steam Tunnels.
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            NameFull: INFANTE-RIVARD, C.
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              Text: 2002 Supplement
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