Preparation of Three New Certified Reference Materials for Food and Environmental Analysis and Certification Using Laboratory Intercomparison as well as Primary Reference Measurement Procedures

Abstract Three new reference materials: MODAS-3 Herring Tissue (M-3 HerTis), MODAS-4 Cormorant (M-4 CormTis), and MODAS-5 Cod (M-5 CodTis) were prepared certified on the basis of results a worldwide intercomparison exercise. Independently our proven method establishing information values, content several essential toxic elements was additionally determined by use ratio primary measurement procedures (definitive methods) based radiochemical neutron activation analysis (RNAA) in case As, Cd, Co, Cr, Fe, Mo, Se, U isotope dilution mass spectrometry (IDMS) Hg, respectively. Good agreement established values obtained confirmed validity certification procedure. The total number which could be amounted to 30, 21, 18 M-3 HerTis, M-4 CormTis, M-5 CodTis, relative frequency individual analytical techniques this campaign calculated discussed. Inductively coupled plasma (ICP-MS) is now dominant technique, followed atomic absorption spectroscopy (AAS), NAA, emission (ES). decreasing share NAA as compared earlier exercises should noticed. only array highly sensitive methods inorganic trace analysis, essentially free from blank. lack foreseeable future may an obstacle prospective campaigns endanger implementation quality assurance analysis.