A QUANTITATIVE METHOD USING A LIGHT MICROSCOPE ON-LINE TO A MACINTOSH COMPUTER FOR THE ANALYSIS OF TREMOLITE FIBRES IN DOLOMITE.
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| Title: | A QUANTITATIVE METHOD USING A LIGHT MICROSCOPE ON-LINE TO A MACINTOSH COMPUTER FOR THE ANALYSIS OF TREMOLITE FIBRES IN DOLOMITE. |
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| Authors: | Lundgren, Lennart1, Lundström, Sten2, Sundström, Gunnel1, Bergman, Gunnel1, Krantz, Staffan1 |
| Source: | Annals of Occupational Hygiene. 1996, Vol. 40 Issue 2, p197-209. 13p. |
| Subjects: | Quantitative research, Macintosh (Computer), Tremolite, Dolomite, Microscopes |
| Abstract: | A modern method for quantitative determination of tremolite fibres in dolomite has been developed which uses light polarizing microscopy with phase-contrast equipment and evaluation on-line to a Macintosh computer. The principle is mass calculation based on fibre dimensions measured in the micro with the help of a programmable multimedia program. The sample is leached in acid, gently crushed and sieved before a small portion is deposited on a cellulose nitrate membrane filter The filter is made transparent with cinnamaldehyde on a microscope slide. The tremolite fibres will be coloured blue with a red to yellow halo when viewed under phase-contrast and thus easy to identify. An ordinary Macintosh computer with special video display cards and software, which enables the microscopist to perform on-line measurements of the fibre dimensions on a display with the help of a mouse, is used. The method does not differentiate between asbestiform and non-asbestiform tremolite. All particles/fibres of tremolite with an aspect ratio of ≥5:1 are measured. The method is very easy to use and the microscope as well as the computer hardware and software are not unusual. Copyright © 1996 British Occupational Hygiene Society. Published by Elsevier Science Ltd. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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