G - Physics – 01 – N
Patent
G - Physics
01
N
150/8
G01N 33/02 (2006.01) G01N 33/18 (2006.01) G01N 33/52 (2006.01)
Patent
CA 1122889
Abstract of the Disclosure An element for the analysis of liquids contains a radiation-transmissive, detectable species migration-inhibiting layer interposed between a porous radiation-blocking layer and a radiation-transmissive reagent layer. All three layers are permeable to a predetermined analyte. The reagent layer contains a composition that provides a detectable species such as a dye in proportion to the concentration of the analyte that diffuses into the reagent layer from the overlying porous radiation-blocking layer. The detectable species migration- inhibiting layer acts to reduce the migration of, for example, dye from the reagent layer into the porous radiation-blocking layer, where the optical density of the dye cannot easily be measured. Optionally, the above-described three layers can be carried on a radiation-transmissive support, and other layers such as spreading layers, registration layers, and subbing layers can also be present in the element.
308805
Figueras John
Smith-Lewis Margaret J.
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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