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dc.contributor.authorVan der Veeken, P.L.R.
dc.contributor.authorChakraborty, P.
dc.contributor.authorVan Leeuwen, H.P.
dc.date.accessioned2010-06-14T10:03:35Z
dc.date.available2010-06-14T10:03:35Z
dc.date.issued2010
dc.identifier.citationEnvironmental Science & Technology, vol.44(11); 4253-4257
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/3626
dc.description.abstractGel layer based sensors are increasingly employed for dynamic trace metal speciation analysis in aquatic and soil media. In DGT (Diffusive Gradient in Thin film), polyacrylamide hydrogels are commonly used for the diffusive gel layer. While some effects of humic and fulvic acids on the DGT detection of metal species have been observed, the gel permeation properties of the actual humic and fulvic acid compounds themselves have not been analyzed thus far. Here we show with DET (Diffusive Equilibrium in Thin film) that these natural complexing agents do enter the gel layer, and that humic acids even appear to accumulate in the gel, with enrichment factors typicallyonthe order of 10. The results have consequences for the interpretation of DGT-data on metal fluxes from aquatic media containing humics and fulvics.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.rightsCopyright [2010] American Chemical Society. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjecthumic acid
dc.subjectdynamic trace metal
dc.subjectpolyacrylamide hydrogels
dc.titleAccumulation of humic acid in DET/DGT gels
dc.typeJournal Article


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