CERTIFICATION OF A FROZEN MUSSEL TISSUE STANDARD REFERENCE MATERIAL (SRM 1974A) FOR TRACE ORGANIC-CONSTITUENTS

NIST SRM 1974a, Organics in Mussel Tissue (Mytilus edulis), has been i ssued as a frozen tissue homogenate with certified mass fractions for 15 polycyclic aromatic hydrocarbons (PAHs), 20 polychlorinated bipheny l (PCB) congeners, and 7 chlorinated pesticides. Noncertified mass fra ctions are provided for an additional 18 PAHs, 4 PCB congeners, 4 chlo rinated pesticides, 28 inorganic constituents, 16 aliphatic hydrocarbo ns, and methylmercury. The mass fractions for the measured PAHs range from approximately 1 mu g/kg to 164 mu g/kg dry mass while the mass fr actions for the measured PCB congeners range from approximately 3 mu g /kg to 150 mu g/kg dry mass.