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Section: ArticlesTitle: Reference material for the quantitation of alpha-quartz in respirable dust by X-ray diffraction / Stephen Altree-Williams, John G. Byrnes and Meade B. NormanAuthor: Altree-Williams, StephenNotes: Sumario: Two specifications are given for an alpha-quartz reference material suitable for use by the international occupational hygiene community in the quantitation of alpha-quartz in respirable dust by the X-ray diffraction method. The specifications are based on results obtained in a detailed investigation of the properties of respirable-size alpha-quartz samples from 12 different geological and commercial sources. The properties investigated were amorphous surface content, crystallinity index, preferred orientationn, and particle size distributionRelated records: En: The Annals of occupational hygiene. - Oxford [etc.]. - nº 4, 1981 ; p. 347-356Materia / lugar / evento: Higiene industrialContaminantes químicosContaminación atmosféricaControl de la contaminaciónCuarzoPolvo de cuarzoRayos XDifracciónMétodos de análisisOtros autores: Byrnes, John G. Norman, Meade B. Secondary titles: Título: The Annals of occupational hygiene Other categories: 872Rights: In Copyright (InC)