TY - JOUR
T1 - Tartaric acid extraction of organotin compounds from sediment samples
AU - Flores, Marcos
AU - Bravo, Manuel
AU - Pinochet, Hugo
AU - Maxwell, Paulette
AU - Mester, Zoltán
N1 - Funding Information:
M. Flores acknowledges the doctoral fellowship from the CONICYT (Comision Nacional de Ciencia y Tecnología, Gobierno de Chile) .
PY - 2011/5
Y1 - 2011/5
N2 - 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 (NaBEt4) 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.
AB - 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 (NaBEt4) 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.
KW - Butyltin compounds
KW - Focused microwave extraction
KW - Selective extraction
KW - Solid environmental samples
KW - Sulfur interferences
UR - http://www.scopus.com/inward/record.url?scp=79952037005&partnerID=8YFLogxK
U2 - 10.1016/j.microc.2010.12.006
DO - 10.1016/j.microc.2010.12.006
M3 - Article
AN - SCOPUS:79952037005
SN - 0026-265X
VL - 98
SP - 129
EP - 134
JO - Microchemical Journal
JF - Microchemical Journal
IS - 1
ER -
