Combination pH electrode with stable standard potential

Details Combination pH electrode with stable standard potential Combination pH electrode with stable standard potential

2007-10-02

2007-10-02

Olsen, Kaj K. (Department: 1753)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S435000

Reexamination Certificate

active

10074219

ABSTRACT:
Disclosed are combination glass pH electrodes, the standard potential of which is stabilized by means one or more of the following structural modifications:(a) incorporating a noble metal internal element in the pH half-cell;(b) incorporating a noble metal internal element in the reference half-cell;(c) incorporating an internal pH bulb electrolyte with stable pH and oxidation-reduction potential;(d) incorporating an homogenous reference electrolyte with stable oxidation-reduction potential and equitransferent salt;(e) incorporating a liquid junction composed of a porous, inert material;(f) incorporating a reference electrolyte compartment vent;(g) incorporating a storage sleeve, with or without an absorbent medium located therein.

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Aldrich Chemical Company, Inc. Catalog of Chemicals, 1992, p. 1990.
West, S.J., et al.,Ultrapure Water, vol. 15, No. 10, pp. 45-52 (1998).

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