title: Primary reference materials for chemical composition analysis - Proposal for an operational definition.
abstract: A metrologically motivated concept of a "Primary reference material (PRM)" for chemical composition analysis is proposed. This concept turns out to be essentially equivalent to that of a "Certified reference material (CRM)", as described in the relevant ISO Guides. Since the majority of actually available CRMs are far from realizing the theoretical concept, it is proposed to re-name and moderately revise the theoretical concept and to give it a new try to be put into practice.
authors.affiliation: Bundesanstalt für Materialforschung und -prüfung (BAM), D-12200, Berlin, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Hässelbarth