Dosage du quartz dans la poussiere de molasse par la technique infrarouge
An IR technique for the determination of quartz in sandstone dusts is described. This technique is particle-size sensitive; this is well-illustrated with the analyses of dusts collected on different stages of an impactor. Pellets were prepared to obtain precise quantitative determination o...
| Main Authors: | , , |
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| Format: | Article |
| Language: | deu |
| Published: |
Swiss Chemical Society
1992-04-01
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| Series: | CHIMIA |
| Online Access: | https://chimia.ch/chimia/article/view/2123 |
| Summary: | An IR technique for the determination of quartz in sandstone dusts is described. This technique is particle-size sensitive; this is well-illustrated with the analyses of dusts collected on different stages of an impactor. Pellets were prepared to obtain precise quantitative determination
of quartz either by the conventional dilution method or after wet grinding with EtOH. The alcoholic treatment proved far to be superior to the dry homogenization. Finally, different ways of quantification of quartz IR spectroscopy are compared: absorbance at 798 cm-1, integrated
area measurement which includes both bands, 'QUANT' software of Perkin-Elmer. The 'QUANT' software proved to be the easier and the most reliable means of quantitation. A comparison between IR spectrometry and X-ray diffraction is equally reported. This method has been used in a survey of the
quartz dust concentration to which stoneworkers are exposed; these results will be given in another publication.
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| ISSN: | 0009-4293 2673-2424 |