Patent ID: 9151727
Filing Date: 2015-10-06
Classification: G01N

Abstract:
1. A liquid membrane type ion-selective electrode, comprising a liquid membrane type ion-sensitive membrane wherein a predetermined ionophore is supported by a base material, an inner electrode that has electrical conductivity and is arranged at a position on which light that has transmitted through the ion-sensitive membrane is incident, and an internal solution that contains an electrolyte and makes contact with the ion-sensitive membrane and the inner electrode, wherein the ion-sensitive membrane contains a mixture of a resin, an ionophore, and a material selected from the group consisting of an ultraviolet absorber or an ultraviolet reflecting agent, both the ultraviolet absorber and the ultraviolet reflecting agent having an insulative property sufficient to restrain an electric potential fluctuation of the inner electrode due to ultraviolet rays without affecting a measurement by the electrode, thereby preserving the ion-sensitivity of the ion-sensitive membrane, the ultraviolet absorber restraining electric potential fluctuation of the inner electrode by absorbing ultraviolet rays and the ultraviolet reflecting agent restraining electric potential fluctuation of the inner electrode by reflecting ultraviolet rays.