MULTIPLE WAVELENGTH LIGHT SOURCE FOR COLORIMETRIC MEASUREMENT
First Claim
1. A colorimetric wet chemistry analyzer for determining a concentration of an analyte of interest in a sample, the analyzer comprising:
- a reaction chamber configured to receive the sample and facilitate a reaction that changes a color of the sample based on the concentration of the analyte of interest;
a photometric cell operably coupled to the reaction chamber to receive the sample and direct illumination therethrough, the photometric cell having a first illumination source configured to provide illumination at a first wavelength through the photometric cell, a second illumination source configured to provide illumination at a second wavelength through the photometric cell, where the second wavelength is different than the first wavelength, and a photodetector configured to detect illumination passing through the photometric cell; and
a controller coupled to the first illumination source, the second illumination source and the photodetector, the controller being configured to provide an indication of concentration relative to the analyte of interest based on a signal from the photodetector.
2 Assignments
0 Petitions
Accused Products
Abstract
A colorimetric wet chemistry analyzer for determining a concentration of an analyte of interest in a sample is provided. The analyzer comprising includes a reaction chamber configured to receive the sample and facilitate a reaction that changes a color of the sample based on the concentration of the analyte of interest. A photometric cell is operably coupled to the reaction chamber to receive the sample and direct illumination therethrough. The photometric cell has a first illumination source configured to provide illumination at a first wavelength through the photometric cell and a second illumination source configured to provide illumination at a second wavelength through the photometric cell. The second wavelength is different than the first wavelength. A photo detector is configured to detect illumination passing through the photometric cell. A controller is coupled to the first illumination source, the second illumination source and the photo detector and is configured to provide an indication of concentration relative to the analyte of interest based on a signal from the photo detector.
8 Citations
20 Claims
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1. A colorimetric wet chemistry analyzer for determining a concentration of an analyte of interest in a sample, the analyzer comprising:
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a reaction chamber configured to receive the sample and facilitate a reaction that changes a color of the sample based on the concentration of the analyte of interest; a photometric cell operably coupled to the reaction chamber to receive the sample and direct illumination therethrough, the photometric cell having a first illumination source configured to provide illumination at a first wavelength through the photometric cell, a second illumination source configured to provide illumination at a second wavelength through the photometric cell, where the second wavelength is different than the first wavelength, and a photodetector configured to detect illumination passing through the photometric cell; and a controller coupled to the first illumination source, the second illumination source and the photodetector, the controller being configured to provide an indication of concentration relative to the analyte of interest based on a signal from the photodetector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of performing colorimetric analysis of a sample using a wet chemistry analyzer, the method comprising:
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reacting the sample to change the color of the sample based on the concentration of an analyte of interest in the sample; placing the reacted sample in a photometric cell; conveying illumination having a first wavelength through the photometric cell; measuring a signal of a photo detector in response to the illumination having the first wavelength; selectively conveying illumination having a second wavelength through the photometric cell based on the photo detector signal; measuring a signal of the photo detector in response to the illumination having the second wavelength; and providing an indication of the concentration of the analyte of interest based on the photo detector signal. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of performing colorimetric analysis of a sample using a wet chemistry analyzer, the method comprising:
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receiving a selection indicative of a detection range; reacting the sample to change the color of the sample based on the concentration of an analyte of interest in the sample; placing the reacted sample in a photometric cell; selecting one of a plurality of illumination sources to generate illumination through the photometric cell based on the selected detection range; conveying illumination having the selected wavelength through the photometric cell; measuring a signal of a photo detector in response to the illumination having the selected wavelength; and providing an indication of the concentration of the analyte of interest based on the measured photo detector signal. - View Dependent Claims (18, 19, 20)
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Specification