Application of verification and validation procedures depending on the method used

An ICP-AES method with Concentration Ratio Calibration (calibration in relative concentrations) makes it possible to improve significantly the metrological characteristics of certified reference materials (metals, alloys, technical and geological materials). The main reasons for this improvement are advantages combination Calibration. errors sample weighting uncertainty final volume, as well error attributed addition internal standard aliquot excluded from total analysis. Lithium hydroxide fusion silver crucibles has been developed complete transfer ilmenite zirconium concentrates, Mg- Cr- based refractories into solution. Compared lithium metaborate platinum crucibles, proposed is advantageous a lower cost higher solubility melt, possibility boron determination an impurity analyzed materials. When certifying samples, necessary use principle Calibration, i.e., amount mass fractions positive components be determined should not exceed 100 % even when used. While conventional calibration methods one-dimensional space traceabihty concentration ratio works re-dimensional provides accuracy results due n-dimensional It develop theory which will provide more reliable certification samples practice than that exists today.