Method for the determination of species in solution with an optical wave-guide
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United States of America
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Sep 19, 1989
Grant Date -
N/A
app pub date -
Oct 9, 1987
filing date -
Sep 18, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An analyte in solution is made to react with a specific reactant coated on the wave-guide thus modifying the optical properties thereof. The index of refraction of the wave-guide material is higher than that of the reaction medium which ensures that a light signal injected into said guide be carried by multiple total reflection, the distance of penetration of the evanescent wave associated with the totally reflected signal being of the same order of magnitude or greater than the thickness of the analyte-reactant product layer.
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