Photometric apparatus and method
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United States of America Patent
Stats
-
Dec 15, 1981
Grant Date -
N/A
app pub date -
Mar 6, 1980
filing date -
Mar 6, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Photometric apparatus and method for determining the absorbance ratio, in a sample, of two different wavelength lights. A first light is given a reference intensity and is passed through the sample. A second light is passed through the sample and its intensity is varied so that the intensity of the second light that has passed through the sample is equal to the intensity of the first light that has passed through the sample. When these intensities are equal, the intensity of the second light is detected in a state wherein it has not passed through the sample, resulting in an equivalent to the ratio of the absorbance in the sample of the second light and the first light.
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