This article reports the transport of selected carboxylic acids-citric acid, oxalic acid, and tartaric acidthrough an anion-exchange membrane (Neosepta-AMH) in a two-compartment dialysis cell. These basic data have been completed by measurements of the sorption isotherms. The mass-transfer rate has been quantified by the following transport characteristics: the overall dialysis coefficient, the permeability of the membrane, and the membrane masstransfer coefficient. The sorption experiments have revealed that the Neosepta-AMH membrane exhibits the highest affinity to tartaric acid, whereas the lowest affinity has been found for citric acid. The analysis of the mass-transfer data has shown that the membrane is relatively permeable for oxalic acid: all three transport characteristics for oxalic acid are approximately 1 order of magnitude higher than those for citric or tartaric acid.

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