Short-team stability of trace metals in estuarine water samples |
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Authors: | JA Campbell MJ Gardner AM Gunn |
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Institution: | WRc Environment Medmenham Laboratory, Henley Road, Medmenham, P.O. Box 16, Marlow, Bucks. SL7 2HD Great Britain |
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Abstract: | The short-term (up to 24 h) stability of estuarine water with high (22%?) and low (<21%?) salinity, stored unacidified in polythene containers prior to filtration, preservation and determination of dissolved trace metals, was assessed. For the-salinity sample a massive (140%) increase in copper concentration was observed, indicating desorption from the particulate phase; a similar, although less pronounced (11%) effect was found for the high-salinity sample, Evidence was also obtained for a significant loss (30%) of lead from a pre-filtered low-salinity sample, suggesting appreciable adsorption to the container walls. For cadmium and nickel, no substantial changes in concentration were observed. |
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