Stability of Mercury in Seawater Samples

Abstract

The results of a test of sample stability for the determination of mercury in seawater are reported. Acidification (6 ml per litre of concentrated nitric acid) is shown to be an adequate method of preservation for mercury in clean seawater samples at concentrations in the range 1–50 ng Hg l^-1.

References

1. J. E. Dobson, M. J. Gardner, A. H. Griffiths, M. A. Jessep and J. E. Ravenscroft, Accreditation and Quality Assurance, Springer Verlag, Heidelburg, Germany, in the press.
2. R. M. Rosain and C. M. Wai, Anal. Chim. Acta., 1973, 65, 297.
3. D. J. Harper, C. F. Fileman, P. V. May and J. E. Portmann, Methods of Analysis for Trace Metals in Marine and Other Samples, MAFF Aquatic Environment Analytical Methods, Lowestoft, Suffolk, UK, 1991.
4. J. Olafsson, Mar. Chem., 1978, 6, 87.
5. C. Feldman, Anal. Chem., 1974, 46, 99.
6. General Principles of Sampling and Accuracy of Results 1996, HM Stationery Office, London, 1992, ISBN 0-11-752364x.
7. Mercury in Waters, Effluents, Soils and Sediments, HM Stationery Office, London, 1985, ISBN 0-11-751907-3.