Application of speciated isotope dilution mass spectrometry to evaluate extraction methods for determining mercury speciation in soils and sediments

Analytical Chemistry
G M Mizanur Rahman, H M Kingston

Abstract

Extraction techniques commonly used to extract methylmercury or mercury species from various matrixes have been evaluated regarding their potential to transform inorganic mercury to methylmercury, or vice versa, during sample preparation steps by applying speciated isotope dilution mass spectrometry. Two of the five tested methods were highly prone to form inorganic mercury from methylmercury. Some published methods converted methylmercury to inorganic mercury approximately 100% (including the spiked CH(3)(201)Hg(+)). In other methods, as much as 45% of methylmercury was converted to inorganic mercury during extraction. The methods evaluated included cold acid extraction and sonication. Other methods, such as the proposed EPA RCRA Draft Method 3200, microwave-assisted extraction, and another sonication-based methods induced very little or no methylmercury transformation to inorganic mercury. Among these three methods, the proposed Draft EPA Method 3200 was found to be the most efficient.

References

Mar 3, 2001·Fresenius' Journal of Analytical Chemistry·J QianW Frech
Jan 17, 2002·Analytical Chemistry·C R Hammerschmidt, W F Fitzgerald

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Citations

Dec 4, 2014·Analytica Chimica Acta·Luis Carrasco, Emilia Vassileva
Sep 26, 2013·Journal of Agricultural and Food Chemistry·Naudia MartoneH M Skip Kingston
Jan 1, 2009·Sensors·Paul D SelidJulia Xiaojun Zhao
Jul 22, 2005·Analytical and Bioanalytical Chemistry·László AbrankóPéter Fodor
Aug 1, 2020·International Journal of Environmental Research and Public Health·Marina TumoloVito Felice Uricchio
Jul 20, 2021·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Dipuo P Kgabi, Abayneh A Ambushe
Jun 15, 2006·Analytical Chemistry·Eric Bakker, Yu Qin

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