Chloramine amperometric sensor
AssigneeRosemount Analytical Inc.
InventorChang-Dong Feng
Life of this patent
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Abstract
A chloramine amperometric sensor includes a sensor body with an electrolyte disposed inside the sensor body. A membrane is coupled to the sensor body and adapted to pass chloramine therethrough. A reference electrode is disposed in the electrolyte and coupled to a first conductor. A second conductor is coupled to a working electrode that is disposed proximate the membrane. The working electrode is constructed from a noble metal in non-compact form. The non-compact form can be a Gas Diffusion Electrode, which can include metal mesh, carbon paper, carbon cloth, metal/carbon powder loaded on a porous membrane or any combination thereof.
Claims16
In a chemical sensor, a method of measuring chloramine, the method comprising:
- placing a solution containing chloramine in fluidic communication with a membrane permeable to chloramine;
- providing a working electrode having a noble metal in non-compact form, wherein the working electrode at least partially submerged in electrolyte;
- diffusing the chloramine through the membrane into the working electrode;
- measuring a current between the working electrode and a reference electrode disposed in the electrolyte;
- and
- determining the chloramine from the measured current.
Dependencies are inferred from the claim text.