Uncertainty contributions to species specific isotope dilution analysis. Part 1. Characterisation and stability of 199Hg and 13C isotopically enriched methylmercury by 1H NMR

Robert Clough; Simon. T. Belt; E. Hywel Evans; Pete Sutton; Ben Fairman; Tim Catterick

doi:10.1039/B302880C

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Uncertainty contributions to species specific isotope dilution analysis. Part 1. Characterisation and stability of ¹⁹⁹Hg and ¹³C isotopically enriched methylmercury by ¹H NMR†

Robert Clough,^a Simon. T. Belt,^a E. Hywel Evans,*^a Pete Sutton,^b Ben Fairman^b and Tim Catterick^b

Author affiliations

* Corresponding authors

^a Plymouth Environmental Research Centre, University of Plymouth, School of Environmental Sciences, Drake Circus, Plymouth, UK

^b LGC, Queens Road, Teddington, Middlesex, UK

Abstract

¹⁹⁹ Hg-enriched methylmercurychloride has been synthesised, purified, and characterised by ¹H nuclear magnetic resonance spectroscopy (NMR) for use in species specific isotope dilution analysis (IDA). The stability of methylmercury during the analytical procedure was investigated using ¹⁹⁹Hg and ¹³C isotopically labelled methylmercury analogues and ¹H NMR spectroscopy. The halide order of preference for methylmercury was found to be I > Br > Cl. No evidence was found for the decomposition, or formation of methylmercury during equilibration with soil (NIST 2710) or dogfish muscle (DORM-2), or during the chromatographic separations.

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Article information

DOI: https://doi.org/10.1039/B302880C
Article type: Paper
Submitted: 12 Mar 2003
Accepted: 16 May 2003
First published: 24 Jul 2003

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J. Anal. At. Spectrom., 2003,18, 1033-1038

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Uncertainty contributions to species specific isotope dilution analysis. Part 1. Characterisation and stability of ¹⁹⁹Hg and ¹³C isotopically enriched methylmercury by ¹H NMR

R. Clough, Simon. T. Belt, E. H. Evans, P. Sutton, B. Fairman and T. Catterick, J. Anal. At. Spectrom., 2003, 18, 1033 DOI: 10.1039/B302880C

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Journal of Analytical Atomic Spectrometry