Application of enriched stable ^sup 196^Hg isotope for monitoring the stability of total mercury in water samples

A novel tool for the investigation of stability of total mercury in water samples is presented. The study focuses on the application of enriched ...Hg stable isotopic reagent for the stability studies. Natural abundance of ...Hg in water samples is only 0.15%. Thus, the use of the ...Hg isotope spik...

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Bibliographic Details
Published in:International journal of environmental analytical chemistry 2015-01, Vol.95 (1), p.1
Main Authors: Näykki, Teemu, Sara-Aho, Timo, Väisänen, Tero, Leito, Ivo
Format: Article
Language:English
Subjects:
Analytical chemistry
ISO standards
Isotopes
Mass spectrometry
Mercury
Water temperature
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Summary:A novel tool for the investigation of stability of total mercury in water samples is presented. The study focuses on the application of enriched ...Hg stable isotopic reagent for the stability studies. Natural abundance of ...Hg in water samples is only 0.15%. Thus, the use of the ...Hg isotope spike represents a major advantage, when it can be assumed that all the measured isotope is the same as is accurately added by the analyst, and the change in its mass concentration can be followed simply and reliably. Tests were carried out with industrial waste water and two type of the natural water. Cold vapour (CV) inductively coupled plasma mass spectrometer (ICP-MS) technique was applied for the mercury measurements. Monitoring was continued for approximately 100 days. It is commonly advised that the measurement for total mercury in water samples should be carried out within 14 days. In this study the samples were observed to be stable for more than three months, if they were stored at a temperature of 4-6...C. The results of this stability study were in line with the guidance presented in EPA standard 1631. However, the samples were noticed to be stable for a much longer time than is presented in the standard method ISO 17852. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0306-7319
1029-0397