Simplified sample preparation for GC speciation analysis of organotin in marine biomaterials

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Abstract
Two simple sample preparation methods for the speciation analysis of triphenyltin and butyltin compounds in marine biotissues, using tetramethylammonium hydroxide (TMAH) solubilization and enzymic hydrolysis, have been developed and compared with conventional acid digestion. Derivatization was carried out in situ using sodium tetraethylborate (NaBEt4) without prior separation of the analytes from the tissue matrix. Separation and detection was performed using capillary gas chromatography (GC) coupled to microwave‐induced plasma atomic emission spectrometry (MIP AE) allowing detection limits of 2 ng g−1 (as tin) to be reached. The accuracy of the presented methods was demonstrated by the analysis of a fish reference material (NIES No. 11). the necessity for sample clean‐up is discussed and examples of the analysis of mussel tissue are shown.