Microwave-accelerated speciation analysis for butyltin compounds in sediments and biomaterials by large volume injection capillary gas chromatography quartz furnace atomic absorption spectrometry

✍ Scribed by Joanna Szpunar; Michiel Ceulemans; Vincent O. Schmitt; Freddy C. Adams; Ryszard Łobiński

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 632 KB
• Volume: 332
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(96)00257-7

✦ Synopsis

A method for speciation analysis of butyltins in sediments and biomaterials by capillary GC with atomic absorption spectrometric detection was developed. Mono-, di-and tributyltin in sediments were quantitatively leached with 50% acetic acid, whereas biomaterials were dissolved in a 25% tetramethyl ammonium hydroxide (TMAH) solution; both processes were completed under the action of a low-power focused microwave field within l-5 min which is 20-100 times faster than with conventional procedures. The butyltins were derivatized with sodium tetraethylborate (NaBEt) in the aqueous phase, and simultaneously extracted into hexane (5min). On-line preconcentration in the injector liner by solvent venting enabled to obtain a detection limit of 5 ng g-' for 0.2 g of dry sample. A sample throughput of 5 samples h-' was achieved. The method developed was validated by analyzing three certified reference materials: PACS-1, CRh4 462 and NIES 11.