Streaming potential in a liquid ion-exchange membrane electrode

A streaming potential in a liquid membrane electrode sensitive to nicotinate ion (3-pyridinemonocarboxylate), has been observed during dynamic electrode response measurements carried out by sodium nicotinate step-wise concentration increases. It was possible to separate the streaming potential from the dynamic electrode response and to study it as a function of the flow-rate in the cell and of the nature of the liquid membrane support.A streaming potential was observed with Millipore MF-PH supports (mixed esters of cellulose) but not with Fluoropore (polytetrafluoroethylene bonded to polyethylene net) supports.