Analytical applications of gas membrane electrodes

Abstract

Porous and permeable membrane electrode structures are now widely exploited in sensors for species in aqueous and gas phases. Potentiometry and amperometry have been applied frequently in conjunction with membrane electrode methodology. Only recently has the classic technique of conductometry been used in tandem with membrane electrodes. Ambient-level sulphur dioxide and carbon dioxide conductance sensors based on structures involving porous membranes and thin water layers are described and the principles governing their response are discussed.