Unified test means for ion determination
First Claim
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1. A test means for determining the presence of an ion in an aqueous test sample, the test means comprising:
- a reagent layer composed of a substantially nonpolar, nonporous carrier matrix incorporated with(a) an ionophore capable of forming a complex with a specific ion to be determined, and(b) a reporter substance capable of interacting with the complex of the ionophore and the ion to produce a detectable response.
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Abstract
A test means, test device and method for use for determining the presence of an ion in a test sample are disclosed. The test means comprises a substantially nonpolar, nonporous carrier matrix incorporated with an ionophore capable of forming a complex with the specific ion and reporter substance capable of interacting with the complex of ionophore and ion to produce a detectable response. The test means disclosed is particularly useful for serum potassium determinations. The test means forms the reagent layer in a multilayer format particularly suited to whole blood electrolyte determinations.
56 Citations
34 Claims
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1. A test means for determining the presence of an ion in an aqueous test sample, the test means comprising:
- a reagent layer composed of a substantially nonpolar, nonporous carrier matrix incorporated with
(a) an ionophore capable of forming a complex with a specific ion to be determined, and (b) a reporter substance capable of interacting with the complex of the ionophore and the ion to produce a detectable response. - View Dependent Claims (2, 3, 4, 5, 6)
- a reagent layer composed of a substantially nonpolar, nonporous carrier matrix incorporated with
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7. A test means for determining the presence of an ion in an aqueous test sample, the test means comprising a reagent layer composed of a substantially nonpolar, nonporous carrier matrix incorporated with
(a) an ionophore capable of forming a complex with a specific ion to be determined; - and
(b) a neutral reporter compound having a dissociable proton, which proton is capable of dissociating from the reporter upon interaction with the complex of the ionophore and the ion to produce a detectable response. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A multilayer test means for determining the presence of an ion in an aqueous test sample, comprising:
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(a) a reagent layer comprising a substantially non-polar, nonporous carrier matrix incorporated with an ionophore capable of forming a complex with a specific ion to be determined and a reporter substance capable of interacting with the complex of the ionophore and the ion to produce a detectable response, and (b) a reflecting layer disposed on top of the reagent layer and in laminar relationship thereto, said reflecting layer including one or more materials which act as a background in order to facilitate the detection of a detectable response in the reagent layer. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A multilayer test means for determining the presence of an ion in a whole blood sample, comprising:
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(a) a reagent layer comprising a substantially non-polar, nonporous carrier matrix incorporated with an ionophore capable of forming a complex with a specific ion to be determined and reporter substance capable of interacting with the complex of the ionophore and the ion to produce a detectable response, and (b) a reflecting layer disposed on top of the reagent layer and in laminar relationship thereto, said reflecting layer including one or more materials wlich act as a background in order to facilitate the detection of a response in the reagent layer and sufficient sodium chloride to impart hematocrit independence to the ion determination.
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34. A multilayer test means for determining the presence of an ion in a whole blood sample, comprising:
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(a) a reagent layer comprising a substantially non-polar, nonporous carrier matrix incorporated with an ionophore capable of forming a complex with a specific ion to be determined and a reporter substance capable of interacting with the complex of the ionophore and the ion to produce a detactable response; (b) a reflecting layer disposed on top of the reagent layer and in laminar relationship thereto, said reflecting layer including one or more materials which act as a background in order to facilitate the detection of a response in the reagent layer; and (c) an opacifying layer in laminar relationship to the reflecting layer and disposed on top of the reflecting layer, the opacifying layer containing particles for imparting an opaque appearance to the opacifying layer; wherein sufficient sodium chloride is incorporated in either the reflecting layer, the opacifying layer or both, to impart hematocrit independence to the ion determination.
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Specification