Eastman-kodak Company

Derek A Thomason

Christopher P Moore

Malcolm D Purbrick

Karel L Petrak

Kevin J Parr

Radiation-sensitive compositions are disclosed of a type suitable for preparing ion sensitive membranes for electrochemical ion sensors. The compositions are comprised of a radiation-sensitive polymer containing radiation-sensitive recurring units having an ionophore group and recurring units having a crosslinking group. In preparing a membrane the radiation-sensitive composition is coated onto a sensor, exposed to activating radiation to produce crosslinking in areas where the membrane structure is desired, and removed in any remaining non-exposed areas.

Radiation-sensitive composition and use thereof in the preparation of

An ion-sensitive composition and an ion-selective electrode is disclosed in which the ionophore is an organotin having the formula

Compositions and electrodes comprising organotin ionophores

An ion-sensitive electrochemical sensor comprises an electrode body having an ion-sensitive polymeric membrane coated thereon. The membrane comprises a water-insoluble copolymer having ion exchange sites and has a glass transition temperature greater than about 80.degree. C. The sensor is used to determine ion concentration by contacting it with a test solution and determining the ion concentration as a function of the potential of the electrode.

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Hertfordshire, United Kingdom

Derek A Thomason