CERTIFICATION OF 3 MUSSEL TISSUE STANDARD REFERENCE MATERIALS (SRM) FOR METHYLMERCURY AND TOTAL MERCURY CONTENT

SRM 1974a, Organics in Mussel Tissue (Mytilus edulis); SRM 2974, Organ ics in Mussel Tissue (freeze-dried); and SRM 2976, Mussel Tissue (trac e elements and methylmercury) have been recently certified for methylm ercury and total mercury content. Three independent analytical procedu res were used to determine the certified methylmercury concentrations. Four independent procedures combined with data from two intercomparis on exercises were used to determine the certified total mercury concen trations. These materials are the first certified metal speciation env ironmental SRMs issued by the National Institute of Standards and Tech nology.