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Application of a new focused microwave technology with species-specific isotope dilution analysis for the quantitative extraction of organometallic contaminants in solid environmental matrices

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A new self-tuning single-mode-focused microwave technology has been evaluated in this work to perform the quantitative routine extraction of organometallic species from solid matrices of environmental interest. Species-specific isotope dilution analysis has been employed to better investigate the real influence of the microwave-assisted extractions on the final results. The advantages of such methodology in comparison with other established microwave units for the routine speciation analysis of organomercury and organotin compounds are discussed (such as the capability of using disposable glass vials, a self-tuning mode to provide an accurate control of the temperature and pressure inside of the vials, and the possibility of performing automated sequence of extractions with low sample size). The results obtained in this work demonstrated that such technology provides a fast and reliable quantitative extraction of the organometallic species in a wide range of extraction conditions even when the multi-elemental (Sn and Hg) species-specific determination is carried out.
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Keywords: butyltin compounds; focused microwave extraction; methylmercury; solid environmental samples; species-specific isotope dilution

Document Type: Research Article

Affiliations: 1: Department of Chemistry, Centre GTS, Universitat Autonoma de Barcelona, Barcelona, Spain 2: Laboratoire de Chimie Analytique Bio-Inorganique et Environnement, UMR-CNRS 5254-IPREM, Helioparc, Pau, France 3: CEM Corporation, Matthews, NC, USA

Publication date: November 1, 2008

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