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Please use this identifier to cite or link to this item: http://dspace.utalca.cl/handle/1950/8824

Title: Tartaric acid extraction of organotin compounds from sediment samples
Authors: Flores, M.
Bravo, M.
Pinochet, H.
Maxwell, P.
Issue Date: May-2011
Publisher: ELSEVIER SCIENCE BV
Citation: MICROCHEMICAL JOURNAL Volume: 98 Issue: 1 Pages: 129-134 DOI: 10.1016/j.microc.2010.12.006
Abstract: A new extraction method for the determination of tributyltin (TBT), dibutyltin (DBT) and monobutyltin (MBT) in sediments based on extraction with tartaric acid and methanol has been developed. Tin species were extracted from sediment samples using focused microwave technology, then ethylated with sodium tetraethylborate (NaBEt(4)) and analyzed by isotope dilution (ID) gas chromatography-mass spectrometry (GC-MS). The advantages of such methodology in comparison with other established extraction methods for the routine speciation analysis of organotin compounds are discussed with respect to sulfur interferences co-extracted from complex matrices. Interferences from elemental sulfur are normally found with acetic acid extraction, but with tartaric acid extraction these interferences were eliminated, demonstrating selective extraction. The accuracy of the analytical procedure was established by analyzing a certified reference material (CRM) (PACS-2, marine sediment) and comparing the results to the certified values. Good agreement between determined and certified values for butyltin compounds was obtained. Finally, some complex sediment samples collected from San Vicente's Bay, Chile, were analyzed with the proposed methodology, demonstrating its potential value for monitoring butyltins in environmental samples with high concentrations of sulfur compounds. (C) 2010 Elsevier B.V. All rights reserved.
Description: FLAME PHOTOMETRIC DETECTION; GAS-CHROMATOGRAPHY; SULFUR INTERFERENCES; SPECIATION ANALYSIS; ENVIRONMENTAL-SAMPLES; PHENYLTIN COMPOUNDS; MASS-SPECTROMETRY; ELEMENTAL SULFUR; ELIMINATION; BUTYLTIN
URI: http://dspace.utalca.cl/handle/1950/8824
ISSN: 0026-265X
Appears in Collections:Artículos en publicaciones ISI - Universidad de Talca

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