Due to the fact that powders are affected by mineralogy and particle size effects, it is almost impossible to use a single XRF calibration curve for the analysis of such a wide range of different materials using the pressed powder preparation method. When fused in a borate glass, all mineralogy and particle size effects are eliminated. A single XRF calibration curve covering the whole range of concentrations for all elements of interests for the cement  industry raw materials analysis can be made.

This paper examines all the XRF analytical conditions for the calibration of the entire range of raw materials using the robust borate fusion sample preparation methodology as well as the numerous Reference Materials (RMs) used for this analytical application. The results of this general and unique XRF raw materials calibration will also be presented in terms of precision, accuracy, and limit of detection.

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