Thermal selectivity multivariate optical computing
First Claim
1. A method of using photoacoustic spectroscopy to determine chemical information about a sample of an analyte, the method comprising the steps of:
- emitting a light ray for interaction with a sample of an analyte;
passing the light ray through a multivariate optical element;
transmitting the interacted light ray from the sample into a detection cell having a fill fluid disposed in the detection cell, the fill fluid selected to have molecules of the analyte disposed to absorb the transmitted light ray;
producing a thermal wave and oscillation in the fill fluid proportional to an intensity of the light ray;
inducing a pressure oscillation in the fill fluid by the thermal wave; and
detecting the pressure oscillation by a microphone to determine information about the analyte.
2 Assignments
0 Petitions
Accused Products
Abstract
A method of using photoacoustic spectroscopy to determine chemical information about an analyte includes the steps of emitting a light ray for interaction with a sample of an analyte; transmitting the light ray through a fill fluid disposed in a detection cell, the fill fluid having molecules substantially similar to molecules of the analyte to absorb the light ray; producing a thermal wave and oscillation in the fill fluid proportional to an intensity of the light ray; including a pressure oscillation in the fill fluid by the thermal wave; and detecting the pressure oscillation by a microphone to determine information about the analyte sample.
-
Citations
13 Claims
-
1. A method of using photoacoustic spectroscopy to determine chemical information about a sample of an analyte, the method comprising the steps of:
-
emitting a light ray for interaction with a sample of an analyte; passing the light ray through a multivariate optical element; transmitting the interacted light ray from the sample into a detection cell having a fill fluid disposed in the detection cell, the fill fluid selected to have molecules of the analyte disposed to absorb the transmitted light ray; producing a thermal wave and oscillation in the fill fluid proportional to an intensity of the light ray; inducing a pressure oscillation in the fill fluid by the thermal wave; and detecting the pressure oscillation by a microphone to determine information about the analyte. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of using photoacoustic spectroscopy to determine chemical information about a sample of an analyte, the method comprising the steps of:
-
emitting a light ray for interaction with a sample of an analyte; transmitting the interacted light ray from the sample into a single, dual function detection cell, the single detection cell having a fill fluid disposed in therein and a microphone disposed therein, the fill fluid selected to have analyte molecules disposed to absorb the transmitted light ray; producing a thermal wave and oscillation in the fill fluid of the single detection cell, the thermal wave and oscillation proportional to an intensity of the light ray; inducing a pressure oscillation in the fill fluid of the single detection cell by the thermal wave; detecting the pressure oscillation by the microphone to determine information about the analyte; and utilizing the single detection cell to measure transmission spectra of the light ray and to generate a regression vector for use with a multivariate optical element. - View Dependent Claims (11)
-
-
12. A method of using photoacoustic spectroscopy to determine chemical information about a sample of an analyte, the method comprising the steps of:
-
providing a detection cell, the detection cell having a fill fluid disposed therein and a microphone disposed therein; providing a light source external of the detection cell; providing a sample of an analyte external of the detection cell and between the light source and the detection cell; emitting a light ray from the light source; directing the emitted light ray through a multivariate optical element; directing the light ray to pass through the sample of an analyte; directing light rays that have passed through the sample into the detection cell, the fill fluid selected to have analyte molecules disposed to absorb the transmitted light ray; producing a thermal wave and oscillation in the fill fluid of the detection cell, the thermal wave and oscillation proportional to an intensity of the light ray; inducing a pressure oscillation in the fill fluid of the single detection cell by the thermal wave; and detecting the pressure oscillation by the microphone to determine information about the analyte. - View Dependent Claims (13)
-
Specification