Summary
For characterizing the homogeneity of a copper standard for optical emission spectrometry, the results of spark source mass spectrographic (SSMS) milliprobing have been treated by diverse chemometric methods. The proposed strategy includes visualization of the data, global homogeneity testing for each element, testing the anisotropy of elemental distributions, search for correlation between elements, and statements on the homogeneity with respect to other analytical procedures. The copper standard was proved to be non-homogeneous for SSMS but homogeneous for techniques of optical emission spectroscopy having larger sampling volumes.
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Dedicated to Prof. Dr. G. Tölg on the occasion of his 60th birthday
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Liebich, V., Ehrlich, G., Stahlberg, U. et al. Characterization of the chemical homogeneity of solid-state standard materials by chemometric methods. Z. Anal. Chem. 335, 945–953 (1989). https://doi.org/10.1007/BF00466387
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DOI: https://doi.org/10.1007/BF00466387