Method of identifying a substance by infrared imaging
First Claim
1. A method of detecting and identifying at least one substance contained in a sample which also contains a reference material comprising the steps of providing said sample at a first temperature;
- allowing said sample to change from said first temperature to a second temperature;
scanning the sample with a means for measuring infrared radiation after said sample has reached said second temperature so as to sense the temperature of said at least one substance and of said reference material;
determining the temperature difference between said at least one substance and said reference material; and
identifying said at least one substance by the temperature difference between said at least one substance and the reference material.
1 Assignment
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Accused Products
Abstract
The method of detecting and identifying a substance in a sample requires the sample to be changed from a first temperature to a second temperature, the sample scanned with an instrument for measuring infrared radiation, the temperature difference between the temperature of the substance and a reference temperature determined, and the substance identified based on this temperature difference. The infrared method allows for the objective determination of a substance in a sample without the necessity of the labor and time required in conventional methods and is especially suitable for detecting the presence of "stickies" in recycled paper.
39 Citations
10 Claims
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1. A method of detecting and identifying at least one substance contained in a sample which also contains a reference material comprising the steps of providing said sample at a first temperature;
- allowing said sample to change from said first temperature to a second temperature;
scanning the sample with a means for measuring infrared radiation after said sample has reached said second temperature so as to sense the temperature of said at least one substance and of said reference material;
determining the temperature difference between said at least one substance and said reference material; and
identifying said at least one substance by the temperature difference between said at least one substance and the reference material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- allowing said sample to change from said first temperature to a second temperature;
Specification