Zusammenfassung
Die Bestimmung von Dimethylquecksilber, Methylquecksilber, Ethylquecksilber, Dimethylarsin und Methylarsin in Wasser und atmosphärischen Proben wurde untersucht. Die Verbindungen wurden aus Wasser mit Hilfe eines Benzol-Toluol-Gemisches extrahiert, falls erforderlich eingedampft und durch Gas-Chromatographie mit AAS-Detektion analysiert. Zur Verwendung kam eine 45-cm-Tenax-Säule. Folgende Nachweisgrenzen wurden gefunden: 4 ng Hg in Dimethyl- und Methylquecksilber, 5 ng Hg in Ethylquecksilber und 25 ng As in Dimethyl- und Methylarsin je Liter Wasser. 12–45 bzw. 7–l5 ng Hg l−1 Methyl- bzw. Ethylquecksilber wurden in natürlichem Wasser und Schnee von Ontario bestimmt. Die Menge an Methylarsin schwankte von 40 bis 90 ng Hg l−1. Dimethylquecksilber und Dimethylarsen wurden nur im Humber gefunden
Summary
A study of the determination of dimethylmercury, methylmercury, ethylmercury, dimethylarsine and methylarsine in water and in atmospheric samples was carried out. The studied compounds were extracted from water by a benzene-toluene mixture, evaporated if necessary and analyzed by gas chromatography with atomic absorption spectrometry as a detector. A 45 cm column packed with Tenax was used. The detection limits of the procedure were: 4 ng Hg in dimethylmercury and methylmercury, 5 ng Hg in ethylmercury and 25 ng As in dimethyl and methylarsine in 1 l water. Methylmercury and ethylmercury were detected in Ontario natural waters and snow at 12–45 and 7–15 ng Hg l−1 respectively. The level of methylarsine varied from 40 to 90 ng l−1. Dimethylmercury and dimethylarsine were detected only in the Humber River.
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Paudyn, A., Van Loon, J.C. Determination of organic forms of mercury and arsenic in water and atmospheric samples by gas chromatography-atomic absorption. Z. Anal. Chem. 325, 369–376 (1986). https://doi.org/10.1007/BF00505462
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DOI: https://doi.org/10.1007/BF00505462