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  • Analytical Chemistry and Spectroscopy  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 3 (1974), S. 137-142 
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Description / Table of Contents: An automatic device for preparing samples for X-ray fluorescence analysis is described. Based on a fusion technique with the proper flux, it produces glass buttons which can lbe directly analysed with the spectrometer.The apparatus consists essntially of two high frequency furnaces which are used for fusing the samples and casting the beads, respectively. The corresponding vessels, i.e. crucible and mould, and made of a special platinum + gold + rhodium alloy. The automatic preparation sequence lasts eight minutes.The preparation reproducibility which can be achieved with this device is illustrated by an application to the analysis of high grade iron ores dissolved in sodium tetraborate. The standard deviation obtained for iron is 0.15% at a 60% iron level.
    Notes: Description d'un appareil automatique de préparation des échantillons pour l'analyse par fluorescence de rayons X, La technique est basée sur la mise en soluation solide de l'échantillon en uve de l'obtention d'une perle directement analysable.L'appreil est composé de deux fours HF, I'un pourla fusion, I'autre pour la coulée Les récipients de fusion et de coulée sont en alliage platine+ or+ rhodium. La seéquence automatique de préparation dure huit minutes.Une application á I'anlyse de minerais de fer reches par miscen solution dens le tétraborate de sodium illustre les reproductibilités de préparation que I'on peut atteindre avec ce matériel (écart type de reproductibiliteé égal á 0,15% de Fe au niveau de 60%).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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