Potentiometric CO.sub.2 sensor having an open titanate- or stannate-based reference electrode
First Claim
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1. A galvanic cell for measuring a gas comprising:
- (a) a reference electrode comprising a combination of (i) titanium dioxide and an alkali-metal or alkaline-earth-metal titanate or (ii) tin dioxide and an alkali-metal or alkaline-earth-metal stannate in intimate mixture, said reference electrode not being isolated from a gas medium to be measured;
(b) a measuring electrode containing a compound which is in thermodynamic equilibrium with the gas to be measured; and
(c) an ion-conducting solid electrolyte contacting the reference electrode and with the measuring electrode.
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Abstract
The invention relates to a a reference electrode for electrolytic cells, comprising a combination of (a) titanium dioxide and an alkali-metal or alkaline-earth-metal titanate or (b) tin dioxide and an alkali-metal or alkaline-earth-metal stannate as a homogeneous mixture.
11 Citations
25 Claims
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1. A galvanic cell for measuring a gas comprising:
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(a) a reference electrode comprising a combination of (i) titanium dioxide and an alkali-metal or alkaline-earth-metal titanate or (ii) tin dioxide and an alkali-metal or alkaline-earth-metal stannate in intimate mixture, said reference electrode not being isolated from a gas medium to be measured; (b) a measuring electrode containing a compound which is in thermodynamic equilibrium with the gas to be measured; and (c) an ion-conducting solid electrolyte contacting the reference electrode and with the measuring electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification