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Distillation, on-line RP C18 preconcentration and HPLC-UV-PCO-CVAAS as a new combination for the determination of methylmercury in sediments and fish tissue |
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| Authors: | Ralf Eiden Ralf Falter Barbara Augustin-Castro Heinz Friedrich Schöler |
| Institution: | 1. Institute of Environmental Geochemistry, University of Heidelberg, INF 236, D-69120, Heidelberg, Germany 2. BIT?K - Bayreuther Institut für Terrestrische ?kosystemforschung, University of Bayreuth, D-95440, Bayreuth, Germany 3. Institute of Applied Physical Chemistry, Forschungszentrum Jülich GmbH, D-52425, Jülich, Germany |
| Abstract: | Distillation as a way of sample digestion has been combined with on-line RP C18 preconcentration and HPLC-UV-PCO-CVAAS (high performance liquid chromatography – ultra violet – post column oxidation – cold vapour atomic absorption spectrometry) for the determination of methylmercury at background levels in sediments, soils and fish tissue. To prove the accuracy of this method, it was applied to sediment and fish tissue reference materials. The results correspond with the reference values within their error ranges. Excellent recoveries (92–95%) were obtained for the sediment samples by means of the standard addition method. The standard deviations of the sediment samples were within an acceptable range (7.2–12.5%), those of the fish samples were substantially lower (3.4–5.0%). The detection limit is 0.04 ng/g for 1 g sample weight. Received: 23 November 1995/Revised: 16 April 1996/Accepted: 20 April 1996 |
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