Electrochemical sensor having a mediator compound
First Claim
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1. An electrochemical gas sensor for detecting an analyte, the electrochemical gas sensor comprising:
- a measuring electrode;
an auxiliary electrode; and
an electrolyte solution containing the mediator compound, said mediator compound comprising a transition metal salt of an acid compound, said acid compound containing one of at least two acid groups or at least one hydroxyl group and at least one acid group, said measuring electrode detecting a concentration of one of H2S and SO2 in a gas, wherein said electrolyte solution is in a saturated state, said mediator being provided as an excess solid in said electrolyte solution.
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Abstract
An electrochemical sensor, especially for gases, is provided having a mediator compound based on transition metal salts of polybasic acids and/or transition metal salts of polyhydroxycarboxylic acids. The electrochemical sensor also contains a DLC, BDD or a precious metal thin-layer measuring electrode (3). The electrochemical sensor may be used for determining SO2 and H2S.
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Citations
24 Claims
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1. An electrochemical gas sensor for detecting an analyte, the electrochemical gas sensor comprising:
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a measuring electrode; an auxiliary electrode; and an electrolyte solution containing the mediator compound, said mediator compound comprising a transition metal salt of an acid compound, said acid compound containing one of at least two acid groups or at least one hydroxyl group and at least one acid group, said measuring electrode detecting a concentration of one of H2S and SO2 in a gas, wherein said electrolyte solution is in a saturated state, said mediator being provided as an excess solid in said electrolyte solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 24)
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22. A method of electrochemical gas sensing for detecting an analyte, the method comprising:
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providing a measuring electrode; providing an auxiliary electrode; providing an electrolyte solution containing the mediator compound, said mediator compound comprising a transition metal salt of an acid compound, said acid compound containing one of at least two acid groups or at least one hydroxyl group and at least one acid group; positioning said measuring electrode and said auxiliary electrode in said electrolyte solution containing the mediator compound to provide an electrochemical gas sensor; and determining SO2 concentration or H2S concentration in a gas using said measuring electrode, said electrolyte being in a saturated state, said mediator being provided as an excess solid in said electrolyte solution. - View Dependent Claims (23)
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Specification