Indicator containing perfluorinated polyurethane membranes for use in optical oxygen sensors
AssigneeOptical Sensors Incorporated
InventorsJames Kane, Roy Martin, Anne Schilling
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Abstract
A ratiometric method for using optical sensors is provided to measure dissolved oxygen in a fluid sample. The sensor is formulated so as to contain an oxygen permeable membrane of a cured perfluorinated urethane polymer and, incorporated therein, an oxygen-sensitive indicator component and a reference dye component. The emission spectrum from the indicator component is calibrated by comparison with that of the reference dye, which is substantially less sensitive to oxygen-quenching and which has a photodecomposition rate similar to the indicator component. Methods for making and using the membrane and sensor are provided as well.
Claims10
A cross-linked oxygen permeable membrane, comprising a polymeric matrix of a cured perfluorinated urethane polymer, and, incorporated therein, an indicator composition of an oxygen indicator and a reference dye, wherein the oxygen indicator provides for an oxygen-sensitive fluorescence emission signal, and wherein the reference dye provides for an oxygen-insensitive fluorescence emission signal.
Dependencies are inferred from the claim text.