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X-ray fluorescence determination of the FeO/Fe2O3tot ratio in igneous rocks
X-Ray Spectrometry, 10/16/09

Finkelshtein AL et al. – The best accuracy was attained for FeO/Fe2O3tot >0.45 with FeO contents varying within 5–15%. In the andesite and basalt samples, the relative standard deviation was <4%. In granite rocks, the error reached 23% at fairly low content of FeO <3%. For the igneous rock samples at a ratio FeO/Fe2O3tot >0.25, the XRF determination of FeO content can be performed at an accuracy comparable with that of wet chemical analysis. The XRF method is preferred because it is fast and convenient for sample preparation. It could be used as an analytical technique in routine geochemical investigations.

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