Abstract
A set of methods for studying the trace element composition of black shales has been developed, including various options for preparing samples for analysis to determine individual groups of elements, including PGE and gold, by atomic spectroscopy methods (ICP-AES, ICP-MS, ETAAS). Data on the content of 54 elements in certified reference materials (CRMs) of black shale rocks SLg-1 and SChS-1 were obtained. The metrologically characterized data will make it possible to use these CRMs for a detailed study of the composition of rocks and ores containing carbonaceous matter. The relevance of the problem is due to the absence of natural multi-element CRMs, in which elevated and clarke contents of gold, silver, as well as all PGEs, are simultaneously certified.
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