Reference electrode using local environment ph control
AssigneeANB Sensors Limited
InventorNathan Lawrence
Life of this patent
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Abstract
A reference system for an electrochemical or ion selective sensor where a reference electrode is coupled with a redox active species and the redox active species is configured to set a pH value of a local environment of a low buffer/low buffering capacity analyte media proximal to the reference electrode. The pH value of the low buffer/low buffering capacity proximal to the reference electrode may be controlled to a pH value at least one pH unit above or below pH 7. The voltammetric response of the redox active species is used as a reference and/or reference signal for the electrochemical or ion selective sensor.
Claims24
A reference system for an ion selective/electrochemical sensor comprising:
- a reference electrode coupled with a redox active species, wherein the redox active species is configured in use to contact a low buffer/low buffering capacity analyte media, characterized in that the redox active species is configured to set a pH of a local environment of the low buffer/low buffering capacity analyte media proximal to the reference electrode.
A method for providing a stable reference for an electrochemical or ion selective sensor, comprising:
- contacting a reference electrode comprising a redox active species with a low buffer/low buffering capacity analyte media, wherein the redox active species is configured to set a pH of a local environment of the low buffer/low buffering capacity analyte media proximal to the reference electrode;
- applying a voltammetric sweep to the reference electrode;
- and
- using properties of a feature/singularity in a voltammetric response of the redox species to the voltammetric sweep as a reference for the electrochemical or ion selective sensor.
Dependencies are inferred from the claim text.