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Analysis of silver in freshwaters sample preservation and pre-treatment studies

Research output: Contribution to Journal/MagazineJournal articlepeer-review

<mark>Journal publication date</mark>1/07/1985
<mark>Journal</mark>International Journal of Environmental Analytical Chemistry
Issue number3-4
Number of pages8
Pages (from-to)247-254
Publication StatusPublished
<mark>Original language</mark>English


Losses of Ag from solution by adsorption on to borosilicate glass and polyethylene sample containers are reported. In distilled water over 80% of a 1μgAgl-1 solution may be adsorbed within 11 days. Acidification to 0.3 M HNO3 satisfactorily preserved samples for this length of time and allowed direct analysis of Ag by graphite furnace atomic absorption spectrometry or pre-concentration by solvent extraction. Filtration through 0.45 μm membranes may bias the dissolved versus suspended partitioning of Ag in freshwaters in favour of the latter, by adsorption of soluble Ag.