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The Time Stability of Dissolved Mercury in Water Samples—I. Literature Review¹

ABSTRACT

Conflicts in the published findings of adequacy of various preservation treatments for water samples intended for mercury analysis are common and appear to result from variations in (i) biological effects; (ii) initial concentrations of mercury; (iii) types of containers used; (iv) properties of the water or laboratory solution (particularly, the dissolved organic and reduced metal cation content); (v) duration of experiments; (vi) concentration of preservative; (vii) analysis, whether conducted in the original storage container or aliquots taken to another vessel; and (viii) the definition of adequacy employed. Of these variables, the biological effects have been overlooked by most investigators.

Key Words: volatilization • organic forms • sample preservation • acids • oxidizing agents • bacteria • Proteus • microbiological cells and metabolites

¹ Publication authorized by the Director, Geological Survey, U. S. Dep. of the Interior.

² Soil Scientist and former Chemist, respectively, Water Resour. Div., U. S. Dep. of the Interior, Menlo Park, CA 94025.

Received for publication January 27, 1975.