DISPOSABLE SODIUM ELECTRODES

In this paper we describe a disposable sodium sensor in double matrix membrane technology. This sensor is prepared from filter paper with an evaporated silver conducting line on one side. For insulation the sen sor is laminated with a pre-perforated heat-sealing film. A defined vo lume of an ion-sensitive polymer matrix membrane cocktail is filled in to one hole. So an ion-sensitive coated film sensor in double matrix m embrane technology is produced. The double matrix membrane is formed b y the polymer matrix membrane and by the additional filter paper matri x. The response behaviour of the sodium electrode is comparable with c onventional macro ion-selective electrodes. By this technology a mass production of low cost sensors is possible.