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Rapids XRD analysis of quartz in airborne dust samples using computer control

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008  940307s1987 gbr|||| | |00010|eng d
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1001 ‎$0‎MAPA20080013608‎$a‎Knight, G.
24510‎$a‎Rapids XRD analysis of quartz in airborne dust samples using computer control‎$c‎C. Knight
520  ‎$a‎The objectives of adding computer control to the X-ray diffraction analysis developed for assessing quartz in airborne dust samples collected in mines were two-fold. First, to minimize counting time: samples with a lot of quartz required scanning of the peak over 3º 2 angles for a short counting time, whereas samples with little quartz required a longer counting time over a narrower scan. Thus both required feedback control to reduce average sample analysis time. Second, interference was frequent and variable even in one mine: to control this it was desirable to analyse on two or more diffraction lines. The computer control was set up to run each sample on up to four diffraction lines, stopping when any pair of lines gave results agreeing within the limits of error chosen
65011‎$0‎MAPA20080585679‎$a‎Higiene industrial
65011‎$0‎MAPA20080605278‎$a‎Contaminantes químicos
65011‎$0‎MAPA20080616441‎$a‎Contaminación atmosférica
65011‎$0‎MAPA20080621186‎$a‎Control de la contaminación
65011‎$0‎MAPA20080540760‎$a‎Cuarzo
65011‎$0‎MAPA20080573324‎$a‎Polvo de cuarzo
65011‎$0‎MAPA20080545192‎$a‎Rayos X
65011‎$0‎MAPA20080553975‎$a‎Difracción
65011‎$0‎MAPA20080591960‎$a‎Métodos de análisis
65011‎$0‎MAPA20080608651‎$a‎Sistemas automatizados
7404 ‎$a‎The Annals of occupational hygiene
7730 ‎$t‎The Annals of occupational hygiene‎$d‎Oxford [etc.]‎$g‎nº 2, 1989 ; p. 235-241