Electrochemical sensor having a mediator compound with a solid
First Claim
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1. An electrochemical gas sensor for detecting an analyte, the electrochemical gas sensor comprising:
- a housing defining an electrolyte space;
a measuring electrode comprising a carbon-containing material, said measuring electrode being disposed in said electrolyte space;
an auxiliary electrode disposed in said electrolyte space;
a liquid electrolyte disposed in said electrolyte space; and
an analyte-selective mediator, said analyte-selective mediator being provided in a saturated form in said electrolyte and being present as an excess solid in the electrolyte space, said measuring electrode detecting a concentration of one of H2S and SO2 in a gas.
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Abstract
An electrochemical sensor is provided especially for gases. The electrochemical sensor has a mediator compound, which is both dissolved in an electrolyte (9) in a saturated form and is present as an excess solid (10) in the electrolyte (9).
16 Citations
21 Claims
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1. An electrochemical gas sensor for detecting an analyte, the electrochemical gas sensor comprising:
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a housing defining an electrolyte space; a measuring electrode comprising a carbon-containing material, said measuring electrode being disposed in said electrolyte space; an auxiliary electrode disposed in said electrolyte space; a liquid electrolyte disposed in said electrolyte space; and an analyte-selective mediator, said analyte-selective mediator being provided in a saturated form in said electrolyte and being present as an excess solid in the electrolyte space, said measuring electrode detecting a concentration of one of H2S and SO2 in a gas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 21)
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19. A process of electrochemical gas sensing, the process comprising:
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providing a housing defining an electrolyte space; providing a measuring electrode comprising a carbon-containing material, said measuring electrode being disposed in said electrolyte space; providing an auxiliary electrode disposed in said electrolyte space; providing a liquid electrolyte disposed in said electrolyte space; providing an analyte-selective mediator; providing said analyte-selective mediator in a saturated form in said electrolyte; providing said analyte-selective mediator as an excess solid in the electrolyte space; and determining SO2 concentration or H2S concentration in a gas using said measuring electrode. - View Dependent Claims (20)
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Specification