Abstract
Certified reference materials are an integral part of laboratory metrological support. They are used in spectral analysis for calibration of measuring instruments, quality control of measurement results, in verification and ensuring the traceability of measurement. The interchangeability between sets, samples of new and earlier issues is rather important. The Institute for Certified reference materials maintains the current nomenclature of certified reference materials for spectral analysis of cast irons. New samples are developed not only to reproduce the previously available characteristics, but also to expand them by increasing the number of certified characteristics or ranges of certified values. The possibility of joint use of the new and previously released sets is shown. To comply with consumer demands, we are going to produce in the second half of 2023 CJSC ISO nodular cast iron with a large number of certified impurities, the total content of which does not exceed 0.30%.
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