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Section: ArticlesTitle: The HSE/NPL phase-contrast test slide / J.M.M. Le Guen... [et al.]Notes: Sumario: The slide provides a means of checking the detection limit of phase-contrast microscopes and is intented primarly for use with the membrane filter method of measuring airborne asbestos fibres. The test objects on the Mark II version (HSE/NPL), which is commercially available, are sets of ridges of resin, mounted on a conventional microscope slide, and immersed in a second resin of slightly lower refractive indexRelated records: En: The Annals of occupational hygiene. - Oxford [etc.]. - nº 2, 1984 ; p. 237-247Materia / lugar / evento: Higiene industrialContaminación atmosféricaControl de la contaminaciónAmiantoMuestreadorMuestreosMicroscopiosTestsOtros autores: Le Guen, Jean M.M. Secondary titles: Título: The Annals of occupational hygiene Other categories: 872Rights: In Copyright (InC)