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Surface Compounds and Reactions in Relation to the Response of Solid State Potentiometric Chemical Sensors

Potentiometric chemical sensors (PCS's) with membranes prepared by pressing a powdered disk of a mixture of inorganic salts or by chemical treatment of metal wire are investigated. The compounds on the surface of the sensor membrane important for its response and processes occurring across the membrane-solution interface for different membranes are discussed. The models of an electrochemical cell with a PCS and equations for corresponding potentials are expressed.

Ion-selective electrode; Flow-injection potentiometry; Silver wire; Membrane; Ptfe; Cysteine; Thiourea; Iodide; Batch

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