Trace gas sensor with reduced degradation
First Claim
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1. A method for preserving a nitric oxide sensing element in an exhaled breath analyzer against loss of sensitivity during storage, said sensing element comprising a nitric oxide binding protein and said method comprising maintaining said sensing element in a low-oxygen environment or an environment that is substantially free of oxygen.
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Abstract
The degradation over time that is commonly seen with analyte-binding proteins when used as sensors for trace amounts of an analyte in a gaseous mixture is reduced by maintaining the sensor in a low-oxygen or oxygen-free environment.
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28 Claims
- 1. A method for preserving a nitric oxide sensing element in an exhaled breath analyzer against loss of sensitivity during storage, said sensing element comprising a nitric oxide binding protein and said method comprising maintaining said sensing element in a low-oxygen environment or an environment that is substantially free of oxygen.
- 15. A device for sensing trace amounts of nitric oxide in exhaled breath, said device comprising a sensing element comprising a nitric oxide binding protein suspended in a support matrix and packaged in an environment that is low in oxygen or substantially free of oxygen.
Specification