Sources of error in the X-ray fluorescence analysis of powders, particularly of iron ores. Reasons for the use of TlOwdered and compacted ore samples in the X-ray fluorescence analysis. Discussion of the sources of error when analysing iron ore powders, such as grain size, effect of matrix and crystal structure. Use of Kiruma and Minette ores for the examination with a hand-operated single-my fluorescence apparatus. Instructions for carrying out the analysis on the basis of the investigation results. Use of comparable samples of very similar composition in order to overcome the difficulties.
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