A new Volume Enhanced Sediment Porewater Sampler (VESPOS) for thein situseparation of pore water from aquatic sediments is described. This sampler offers several improvements over conventionalin situsediment pore water sampling devices, particularly for the collection of a large sample volume (30 ml); simplification in the assembly of the sampler and recovery of the sample; and, consequently, minimizing the risks of sample contamination. The large volume of pore water sampled within a 2-cm interval increases the analytical potential. The sampler significantly reduces the labour and equipment involved in sediment pore water sampling, particularly during retrieval of the samples.
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