Abstract
AbstractSulphide‐bearing certified reference samples were validated by multi‐element wavelength‐dispersive XRF based on the SI units kilogram and mole. An oxidizing borate fusion ensured complete oxidation of the test samples and provided for identical physical and chemical conditions for reference and test samples. Matrix effects were successfully overcome by computer‐aided generation and production of perfectly adapted multi‐element calibration samples. The trueness of the validated results was achieved by the application of pure elements or their compounds having quality assured assays. Detailed and accurate analytical information on certified reference samples CCu‐19 and CZN‐1 (CANMET, Canada) and BCR 26, 27, 28 (Community Bureau of Reference, Belgium) are reported.
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