Accumulation of humic acid in DET/DGT gels
IR@NIO: CSIR-National Institute Of Oceanography, Goa
View Archive Info| Field | Value | |
| Creator |
Van der Veeken, P.L.R.
Chakraborty, P. Van Leeuwen, H.P. |
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| Date |
2010-06-14T10:03:35Z
2010-06-14T10:03:35Z 2010 |
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| Identifier |
Environmental Science & Technology, vol.44(11); 4253-4257
http://drs.nio.org/drs/handle/2264/3626 |
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| Description |
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 typicallyonthe 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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| Language |
en
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| Publisher |
American Chemical Society
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| Rights |
Copyright [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.
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| Subject |
humic acid
dynamic trace metal polyacrylamide hydrogels |
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| Title |
Accumulation of humic acid in DET/DGT gels
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| Type |
Journal Article
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