Patent ID: 6254831
Filing Date: 2001-07-03
Classification: G01N

Abstract:
An optical sensor comprising a support and a single detection layer, wherein said detection layerhas a thickness in the range of about 0.2 to 15 .mu.m,has an outer surface for contact with an analyte-containing fluid,has a response time of less than about 0.7 seconds, andcomprises a mixture of:(a) a luminescent material wherein the luminescence intensity of said luminescent material varies as the amount of an analyte varies, said luminescent material selected from the group consisting of acridines, fluoresceins, rhodamines, pyrenes, and porphyrins;(b) a reflective material having a highly efficient reflectance of the wavelengths of excitation and of emission of said luminescent material, the reflective material representing about 5% to 65% by weight of the detection layer; and(c) a polymeric binder.