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