Luminescence-optical indicator for determining the activity of alkali metal ions in a sample solution
First Claim
1. A luminescence-optical indicator for determining the activity of alkali metal ions in a sample solution through at least indirect contact with said sample solution, wherein said luminescence-optical indicator comprises at least three components:
- a fluorophor having a defined luminescence decay time, a functional group with which said luminescence decay time of said fluorophor can be influenced, and a ionophor selectively and reversibly binding said alkali metal ions to be measured such that said functional group alters said decay time of said fluorophor depending on the activity of said alkali metal ions, said fluorophor being chemically bound to said ionophor and said ionophor being chemically bound to said functional group.
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Abstract
A luminescence-optical indicator for determining the activity of alkali metals based on decay time includes at least three components that are chemically bound to one another, i.e., a fluorophor, a functional group with which the luminescence decay time of the fluorophor can be influenced, and a ionophor binding the alkali metal ions to be measured in a selective and reversible manner, the effect of the functional group on the decay time of the fluorophor being altered in dependence on the activity of the alkali metal ions.
17 Citations
13 Claims
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1. A luminescence-optical indicator for determining the activity of alkali metal ions in a sample solution through at least indirect contact with said sample solution, wherein said luminescence-optical indicator comprises at least three components:
- a fluorophor having a defined luminescence decay time, a functional group with which said luminescence decay time of said fluorophor can be influenced, and a ionophor selectively and reversibly binding said alkali metal ions to be measured such that said functional group alters said decay time of said fluorophor depending on the activity of said alkali metal ions, said fluorophor being chemically bound to said ionophor and said ionophor being chemically bound to said functional group.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A sensor comprising a luminescence-optical indicator for determining the activity of alkali metal ions in a sample solution through at least indirect contact with said sample solution and said luminescence-optical indicator is in optical contact with an excitation and measuring unit, wherein said luminescence-optical indicator has at least three components:
- a fluorophor having a defined luminescence decay time, a functional group with which said luminescence decay time of said fluorophor can be influenced, and a ionophor selectively and reversibly binding said alkali metal ions to be measured, such that said functional group alters said decay time of said fluorophor depending on the activity of said alkali metal ions, said fluorophor being chemically bound to said ionophor and said ionophor being chemically bound to said functional group, and wherein said luminescence-optical indicator is incorporated in a hydrophilic, ion-permeable matrix on a carrier substrate transparent to excitation and measurement radiation.
- View Dependent Claims (11, 12, 13)
Specification