ION SELECTIVE MEMBRANES FOR USE IN ION SENSING ELECTRODES

• Main Authors: CAHALAN, PATRICK T, JEVNE, ALLAN H, FOGT, ERIC J
• Format: Patent
• Language: English; French
• Published: 09.09.1986
• Edition: 4
• Subjects: GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TESTING

An improved method for producing ion-selective membranes having a desired shape and of a desired plastic, for incorporation in ion-sensing electrodes, and the electrodes incorporating these membranes. Thus there is provided a method for producing an ion-sensing electrode, comprising the following ordered steps: dissolving an ion-selective material in a solvent which is a swelling agent for a plastic; subsequently soaking at least a portion of a tube of said plastic, having a proximal end, a distal end an outer wall and a first lumen, in said solvent; subsequently drying said tube until said solvent evaporates; and subsequently filling the first lumen of said tube with an electrolyte gel; said method further comprising the following non-ordered steps which may be performed in any convenient order relative to said ordered steps: sealing the distal end of the first lumen of said tube; and inserting a first electrode into the first lumen of said tube. This method allows the use of preformed polymeric members having the desired shape to produce ion-selective membranes, allowing simplified production of ion-sensing electrodes, as well as combination ion-sensing and reference electrodes.