Optical sensor for the measurement of pH in a fluid, and related sensing compositions and methods
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United States of America Patent
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Mar 4, 1997
Grant Date -
N/A
app pub date -
Jun 10, 1993
filing date -
Jun 10, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical sensor is provided for measuring the pH of a fluid sample. The sensor is formulated using a fluorescent polymer composition comprising a copolymer of a water-dispersable, polyether-containing urethane olefin precursor and a fluorescent monomer species, wherein the ratio of precursor and fluorescent monomer species is such that a predetermined apparent pKa is provided. The sensor is prepared by coating the distal end of an optical waveguide with the fluorescent polymer composition, and curing the copolymer contained in the composition, e.g., by exposure to radiation of a suitable wavelength.
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