Abstract
The dialysis technique for sampling interstitial waters is subject to several potential sources of error. Cellulose‐based membranes can lead to the underestimation or overestimation of porewater solutes. Polycarbonate was found unsuitable for dialyzer construction because of iron precipitation problems. The initial presence of dissolved O2 in the compartments can significantly affect sample composition. Equilibration times of 15–20 days were found adequate for most sediments. An efficient technique for pH measurement in small volumes of porewater is described.
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