Systematische Fehler in der Analyse

A quick and simple fusion and casting technique is described for the preparation of glass discs with both faces smooth and suitable for quantitative X-ray fluorescence analysis of silicate samples. An appropriate choice of the fusion components and sample dilution ensures the homogeneity and stability of the borate-silicate glass. A routine method free from matrix corrections was developed on this basis for the determination of Fe, Ti, Ca, K, Si, and Al in silicate rocks. Pure reagents were used to set up the calibration curves. The precision and accuracy of this method is discussed.