G - Physics – 01 – N
Patent
G - Physics
01
N
18/14, 324/23
G01N 27/30 (2006.01) G01N 27/333 (2006.01) G01N 27/40 (2006.01)
Patent
CA 1211158
ABSTRACT 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 perform- ed 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.
459611
Cahalan Patrick T.
Fogt Eric J.
Jevne Allan H.
Medtronic Inc.
Smart & Biggar
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