Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1995-06-16
1998-11-24
Bell, Bruce F.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204418, 204419, 204435, 204294, 422 56, 422 8203, G01N 2720
Patent
active
058401687
ABSTRACT:
A new substrate for the construction of solid internal contact ion-selective electrode comprising a conductive and porous carbon matrix is described. The well-defined (i.e., fixed) interfacial potential between the organic electroactive phase and the internal reference element, coupled with the electrode's very slow change from water activity at the internal reference element, supports the well-behaved and reproducible electrode operation. Solid contact sensors for two different ions were constructed, and their potentiometric behavior was compared with their symmetric counterparts. The potentiometric response was monitored over a period of one month with excellent results for drift, base line stability, response time, selectivity, and detection limit.
REFERENCES:
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patent: 5160419 (1992-11-01), Kageyama et al.
Stevens, A., et al. "Coated-wire cadium ion-selectice electrode based on the Bidentate Neutral Carrier 4,4'-di(5-nonyl)-2,2' Bipyridine", Analytical Chemica Acta, 248:315-321 (1991).
Cattrall, R.W.,et al., "Coated Wire Ion Selective Electrodes", Analytical Chemistry, 43:13 Nov. 1971.
Hansen, Ruzicka, et al., "Selectrode--The Universal Ion-Selective Electrode", Analytica Chemica Acta, 67:15-178 (1973).
Durselen, L. et al., "New Solid-State Contract for Ion-Selective Liquid Membrane Electrodes", Chimia, 44:214-215 (1990).
Chaniotakis Nikolas A.
West Steven J.
Bell Bruce F.
Linek Ernest V.
Orion Research Inc.
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