Simultaneous determination of butyltin and phenyltin species in sediments using ultrasound-assisted leaching |
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Authors: | J Carpinteiro I Rodríguez R Cela |
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Institution: | (1) Dpto. Química Analítica, Nutrición y Bromatología. Facultad de Química. Universidad de Santiago de Compostela. 15706. Spain e-mail: qnrctd@usc.es, ES |
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Abstract: | A fast and simple procedure is presented for the simultaneous leaching of butyl (mono, di and tributyl) and phenyl organotin
species from sediment samples. Leached compounds are further ethylated with sodium tetraethylborate in aqueous medium, and
analyzed by gas chromatography. After testing the stability of triphenyltin under different extraction conditions, ultrasound-assisted
leaching at room temperature in the presence of acetic acid was been proposed as an extraction procedure compatible with the
simultaneous determination of phenyl- and butyltin compounds in sediments. Recoveries between 70 and 90% were obtained for
phenyl species in spiked samples prepared in the laboratory. Results for butyltin species were validated by use of the reference
material PACS-2. Quantification limits, using GC–MIP–AES as measurement technique, were approximately 5–10 ng g–1. Precision in the consecutive analysis of three sediment samples varied between 3 and 10%.
Received: 16 January 2001 / Revised: 12 March 2001 / Accepted: 13 April 2001 |
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