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High-resolution pore-water sampling with a gel sampler

Krom, M.D., Davison, P., Zhang, H. and Davison, W. (1994) High-resolution pore-water sampling with a gel sampler. Limnology and Oceanography, 39 (8). pp. 1967-1972. ISSN 0024-3590

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Abstract

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.

Item Type: Article
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
Status: Published
Refereed: Yes
URI: http://eprints.whiterose.ac.uk/id/eprint/222

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