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US 10,948,450 B2Granted
Electrochemical measurements of components in coatings
AssigneeGenMark Diagnostics, Inc.
InventorChristopher E. Uhegbu
Life of this patent
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AssigneeGenMark Diagnostics, Inc.
InventorChristopher E. Uhegbu
Estimating the term…
Disclosed are methods of measuring moisture. Specifically, methods of measuring moisture on dry or nearly dry surfaces using an electrochemical sensor are disclosed. The method comprises applying a coating comprising an electrolyte to an electrode wherein water in the air can permeate the coating, applying a voltage to the electrode, detecting a current and, determining if the current indicates the presence of moisture. As a voltage is applied, oxygen in the water is reduced and produces a measurable signal. The method includes measuring the amount of or decrease of dissolved oxygen (in water) at the surface of the electrode over time. Reduction of oxygen acts as a surrogate for water/moisture and, as such, the dryness of the surface of the electrode is calculated based on a predetermined relationship between current and dissolved oxygen (in water). The method is also adapted to measure other target chemicals in a coating.
A method to detect water on a coated substrate comprising the steps of:
A method for determining the presence of a target chemical on a coated substrate, comprising contacting the coated substrate with a voltage under conditions suitable for the oxidation or reduction of the target chemical at the surface of the substrate to create an electrical current, measuring the electrical current created by the oxidation or reduction of the target chemical, and determining if the current indicates the presence of the target chemical on the coated substrate, wherein the target chemical is in a volume less than 10 μL.
A method for determining the presence of a target chemical on a coated substrate, comprising contacting the coated substrate with a voltage under conditions suitable for the oxidation or reduction of the target chemical at the surface of the substrate to create an electrical current, measuring the electrical current created by the oxidation or reduction of the target chemical, and determining if the current indicates the presence of the target chemical on the coated substrate, wherein the target chemical is in a volume of 1 to 10 μL;
Dependencies are inferred from the claim text.