Material for establishing solid state contact for ion...

Details Material for establishing solid state contact for ion... Material for establishing solid state contact for ion...

G - Physics

01

N

G01N 27/333 (2006.01) G01N 27/414 (2006.01)

Patent

CA 2131936

ABSTRACT A polymeric material which to form a stable, reproducible interface between the ionic and electronic domains of an ion selective sensor, or an ion selective field effect transistor, or the like is provided. When employed in an ion selective sensor, the polymeric material is advantageously provided over a solid internal reference electrode and an ion selective material is provided thereover. According to one embodiment, the polymeric material of the invention includes less than about 1.63 x 1021 immobilized charged sites per gram (less than about 2.72 millaequivalents/gram). According to another embodiment, the polymeric material includes immobilized sites of charge opposite that of mobile ions involved in the redox couple. A preferred polymeric materialcomprises a copolymer of methacrylamidopropyltrimethylammoniumchloride and methylmethacrylate. 43

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