The variability of chemical analyses as a function of sample heterogeneity,and the implications to the analyses of rock standards |
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Authors: | Kevin J.D. Ridley Andrew Turek |
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Affiliation: | Department of Geology, University of Windsor, Windsor, Ontario, N9B 3P4, Canada |
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Abstract: | The errors in the chemical analyses of a granodiorite rock powder for 6 constituents (K 2O, Na2O, CaO,∑Fe2O3, MgO, and MnO) have been determined by replicate analyses of the whole rock and of a series of different sieved fractions. Sample inhomogeneity is indicated. This is confirmed by analyses of the fused rock powder. Fusion to a glass is therefore recommended for the preparation of geochemical rock standards. |
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