Hochselektive pH-Festkontakt-Sensoren auf der Basis von Protonen-Carrier-PVC-Membranen mit polymeren Weichmachern

Highly Selective pH-Solid-State-Sensors Based on Proton-Carrier-PVC-Membranes with Polymeric Plasticizers Basing on membrane chemical experiments, the systematic development of a highly selective proton carrier PVC membrance for solid state contact sensors with trioctylamine as ligand and a phthalic acid polyester as polymeric plasticizer is described. Its resistance to saponification leads, compared to monomeric plasticizers, to higher stability of measured values of alkaline solutions. The incorporation of lipophilic anions is indispensable for the repulsion of elements of negative charge. The membrane systems' selectivity is strongly influenced by the ligand's exolipophilic periphery. Several membrane systems attractive for analysis are specified.