| certification of methylmercury content in two fresh-frozen reference materials: srm 1947 lake michigan fish tissue and srm 1974b organics in mussel tissue (mytilus edulis). | this paper describes the development of two independent analytical methods for the extraction and quantification of methylmercury from marine biota. the procedures involve microwave extraction, followed by derivatization and either headspace solid-phase microextraction (spme) with a polydimethylsiloxane (pdms)-coated silica fiber or back-extraction into iso-octane. the identification and quantification of the extracted compounds is carried out by capillary gas chromatography/mass spectrometric ( ... | 2007 | 17242887 |