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Speciation analysis of organomercurial compounds in Fish Tissue by capillary gas chromatography coupled to microwave-induced plasma atomic emission detection

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Author(s): Dorfe Díaz | Miguel Murillo* | Nereida Carrión | Manuel Ríos

Journal: Avances en Química
ISSN 1856-5301

Volume: 3;
Issue: 2;
Start page: 59;
Date: 2008;
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Keywords: Organomercurial compounds | speciation analysis | fish tissue | capillary gas chromatography | microwave-induced plasma emission spectrometry | surfatron resonance cavity.

ABSTRACT
This paper describes a novel approach for analysis of mercury speciation in fish using gas chromatography coupled with microwave-induced plasma optical emission spectrometry (GC-MIP-OES) in surfatron resonant cavity. Sample treatment was based on quantitative leaching of mercury species from fish tissue with ultrasound-assisted acid-toluene extraction. The extracted mercury species analyzed with GC-MIP-OES attained detection limits of 5 and 9 pg for methylmercury (MeHg) and ethylmercury (EtHg), respectively. A complete chromatogram could be completed in 1.5 min. MeHg values obtained with GC-MIP-OES were matched with organic mercury values obtained with selective reduction cold vapour- atomic absorption spectrometry (CV-AAS).
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