| Accumulation of humic acid in DET/DGT gels. | |
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MedLine Citation:
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PMID: 20446728 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Gel 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 typically on the order of 10. The results have consequences for the interpretation of DGT-data on metal fluxes from aquatic media containing humics and fulvics. |
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Authors:
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Pascal L R van der Veeken; P Chakraborty; Herman P van Leeuwen |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Environmental science & technology Volume: 44 ISSN: 0013-936X ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-05-27 Completed Date: 2010-07-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
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Languages: eng Pagination: 4253-7 Citation Subset: IM |
Affiliation:
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Department of Physical Chemistry and Colloid Science, Wageningen University, Wageningen, The Netherlands. pascal.vanderveeken@wur.nl |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Humic Substances* Hydrogels* Permeability |
| Chemical | |
Reg. No./Substance:
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0/Humic Substances; 0/Hydrogels |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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