Sampling of Pore Water for Ex-Situ Measurements

The following section is concerned with the separation of the aquatic pore water phase from the solid sediment phase. As with all particularly problematic and error-inducing procedures, these various techniques have, depending on the case at hand, their specific advantages and disadvantages. 

As a matter of course, one wonld want to analyze the obtained pore water as soon as it has been separated from the sediment to qnantify the dissolved snbstances therein. In daily rontine proceedings, compromises must be made since not all analyses can be carried out simultaneously, and since each and every analytical instmment is not present on board a ship. Thns, it will be necessary to describe the state of knowledge concerning pore water storage, transport and preservation. 

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