Analytical sensitivity enhancement by catalytic transformation
AssigneeThe Trustees of Princeton University
InventorsKevin Lehmann, Yu Chen, Wen-Bin Yan
Life of this patent
Estimating the term…
Abstract
A device and method for quantifying an impurity in an input gas stream. The device and method employ a catalyst to convert the impurity to a detectable species in an output gas stream, and the concentration of the detectable species is then measured by means of a detector.
Claims33
A device for determining a level of concentration of at least one of oxygen or ozone in an input gas stream, the device comprising:
- a catalytic converter comprising a catalyst, the catalyst capable of converting substantially all of the oxygen or ozone into water in an output gas stream;
- and
- a detector coupled to the catalytic converter and adapted to determine a level of concentration of the water in the output gas stream, wherein the detector comprises a cavity ring-down spectrometer.
A device for determining a level of concentration of an impurity in an input gas stream, the device comprising:
- a catalytic converter comprising a catalyst, the catalyst selected to convert substantially all of the impurity into a detectable species in an output gas stream:
- a detector coupled to the catalytic converter and adapted to determine a level of concentration of the detectable species in the output gas stream, wherein the detector comprises a cavity ring-down spectrometer;
- and
- a hydrogen source coupled to the catalytic converter to provide a contact between hydrogen and the catalyst.
A method for determining a level of concentration of at least one of oxygen or ozone in an input gas stream by use of a catalytic converter comprising a catalyst, the method comprising:
- inputting the input gas stream into the catalytic converter;
- converting the oxygen or ozone in the catalytic converter into water in an output gas stream;
- and
- detecting a presence of the water in the output gas stream by means of a cavity ring-down spectrometer.
A method for determining a level of concentration of an impurity in an input gas stream by use of a catalytic converter comprising a catalyst, the method comprising:
- inputting the input gas stream into the catalytic converter;
- converting the impurity into a detectable species in an output gas stream;
- detecting a presence of the detectable species in the output gas stream by means of a cavity ring-down spectrometer;
- providing a hydrogen source;
- and
- coupling the hydrogen source to the catalytic converter to provide a contact between hydrogen and the catalyst.
A device for determining a level of concentration of at least one of oxygen or ozone in an input gas stream, the device comprising:
- a catalytic converter comprising a catalyst of converting substantially all capable of the oxygen or ozone into water in an output gas stream;
- input means for inputting the input gas stream into the catalytic converter;
- and
- detecting means for detecting a presence of the water in the output gas stream, said detecting means comprising a cavity ring-down spectrometer.
A device for determining a concentration of an impurity in an input gas stream, the device comprising:
- a catalytic converter comprising a catalyst for converting substantially all of the impurity into a detectable species in an output gas stream;
- input means for inputting the input gas stream into the catalytic converter;
- detecting means for detecting a presence of the detectable species in the output gas stream, said detecting means comprising a cavity ring-down spectrometer;
- a hydrogen generator coupled to the catalytic converter to provide a contact between hydrogen and the catalyst.
A device for determining a concentration of an impurity in an input gas stream, the device comprising:
- a catalytic converter comprising a catalyst for converting substantially all of the impurity into a detectable species in an output gas stream;
- input means for inputting the input gas stream into the catalytic converter;
- detecting means for detecting a presence of the detectable species in the output gas stream, said detecting means comprising a cavity ring-down spectrometer;
- and
- a hydrogen source coupled to the catalytic converter to provide a contact between hydrogen and the catalyst, wherein the catalyst comprises hydrogen pre-absorbed thereon.
Dependencies are inferred from the claim text.