摘要 : 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%... 展开 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 1-5 min which is 20-100 times faster than with conventional procedures. The butyltins were derivatized with sodium tetraethylborate (NaBEt(4)) in the aqueous phase, and simultaneously extracted into hexane (5 min). On-line preconcentration in the injector liner by solvent venting enabled to obtain a detection limit of 5 ng g(-1) for 0.2 g of dry sample. A sample throughput of 5 samples h(-1) was achieved. The method developed was validated by analyzing three certified reference materials: PACS-1, CRM 462 and NIES 11. [References: 38] 收起