High‐resolution pore‐water sampling with a gel sampler
Open Access
- 22 December 1994
- journal article
- research article
- Published by Wiley in Limnology and Oceanography
- Vol. 39 (8) , 1967-1972
- https://doi.org/10.4319/lo.1994.39.8.1967
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 3, 101±1% SO4, and 102±2% NH4. For Fe and Mn, the gel was fixed in 0.01 M NaOH for ∼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.Keywords
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