Krom, M.D., Davison, P., Zhang, H. et al. (1 more author) (1994) High-resolution pore-water sampling with a gel sampler. Limnology and Oceanography, 39 (8). pp. 1967-1972. ISSN 0024-3590
Sediment pore-water profiles were sampled at high resolution (millimeter scale) with a polyacrylamide gel probe. This simple procedure involves inserting a 1-mm-thick gel held in a plastic probe into sediment. The gel reaches diffusive equilibrium in <1-2 h. For anions, the gel was sectioned, back-equilibrated into distilled-deionized water, and anions determined by high-performance liquid chromatography. Laboratory trials showed recovery of 104+/-4% Cl, 102+/-2% NO3, 101+/-1% SO4, and 102+/-2% NH4. For Fe and Mn, the gel was fixed in 0.01 M NaOH for similar to 3 h, subsectioned, extracted with 1 M HNO3, and analyzed by atomic absorption spectrometry. Field trials were undertaken in Esthwaite Water, a seasonally anoxic lake in the English Lake District. Gel probe data compared well with conventional pore-water extractions.
|Copyright, Publisher and Additional Information:||© Copyright 1994 by the American Society of Limnology and Oceanography Inc.|
|Institution:||The University of Leeds|
|Academic Units:||The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds)|
|Depositing User:||Repository Officer|
|Date Deposited:||23 Dec 2004|
|Last Modified:||06 Jun 2014 17:16|