Method for optically measuring chemical analytes
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United States of America Patent
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Apr 29, 1997
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app pub date -
Aug 6, 1993
filing date -
May 3, 1991
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Abstract
A system and method in which a photoluminescent ligand is added to a sample to be analyzed in the form of a photoluminescent probe having intrinsic analyte-induced lifetime changes. The method preferably employs phase-modulation fluorometry to measure the lifetime changes. Specific probes are disclosed for measuring various analytes, particularly ionic solutes, including H.sup.+, Ca.sup.2+ and K.sup.+.
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