Determination of cristobalite in respirable airborne dust using x-ray diffraction

✍ Scribed by J.E. Chisholm

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 877 KB
• Volume: 286
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(94)80180-0

✦ Synopsis

During 1993, the UK Health and Safety Executive (HSE) will publish a recommended method for the analysis of cristobalite in respirable airborne dust. Various compromises and uncertainties are inherent in such a method and place limitations on the overall accuracy of analysis. Compromises have to be made in the sampling process, in the choice of filter used for sampling, between speed and reliability in the analysis itself and in quality control. Analytical uncertainties arise mainly from variations in the intensity and profile of the cristobalite diffraction maxima, which raise doubts over the validity of the available standards; the unavoidable dependence on the primary diffraction line at low levels of cristobalite and the validity of the calibration close to the origin.