Test for the identification of glucose and for the determination of glucose

• US 4,281,062 A
• Filed: 07/23/1979
• Issued: 07/28/1981
• Est. Priority Date: 07/25/1978
• Status: Expired due to Term

• Current Assignee: VEB Arzneimittelwerk Dresden German Democratic Republic
• Original Assignee: Veb Arzneimittelwerk Dresden
• Inventors: Kallis, Karl-Heinz
• Primary Examiner(s): Wyse, Thomas G.
• Application Number:
  US06/060,168
• Time in Patent Office: 736 Days
• Field of Search: 435/14, 435/28, 435/175, 435/288, 435/296, 435/300, 435/25, 422/56
• US Class Current: 435/14
• CPC Class Codes: C12Q 1/54 involving glucose or galactose
• CPC Class Codes: Y10S 435/805 Test papers

Abstract

Glucose identification and determination test. A test strip contains a metering zone, a reaction zone with glucose oxidase, and an indicator zone having at least one indicator signal zone of peroxidase and indicator applied in the form of stripes alternating with untreated intermediate spaces. The metering zone may be impregnated with a colorant, oxidizing, precipitating or buffering agent. The glucose oxidase is applied in an acid solution below the isoelectric point to prevent substrate inhibition by means of test fluid diffusion and may be in the form of an immobilized suspension. Together with a flow-inducing agent, the test strip allows a reaction not influenced by the time elapsed after sampling. Intermediate zones located between the reaction zone and the metering zone and/or the identification zone may be prepared with buffering substances. The test strip may be located within a capillary tube of 1-3 mm diameter and 40-120 length made of glass or plastic.

Claims

1. Test for the identification of glucose and for the determination of glucose, comprising locating, in given instances within a capillary tube marked at both its ends, a test strip which, conjointly with a flow-inducing agent, will allow a reaction not influenced by the time elapsed after sampling, the test strip containing a metering zone, a reaction zone with glucose oxidase applied in an acid solution below the isoelectric point and affixed to it to prevent a substrate inhibition by means of the diffusion of the test fluid taking place within it, and an indicator zone having at least one indicator signal zone of peroxidase and indicator applied in the form of stripes and alternating with untreated intermediate spaces.

2. Test as per claim 1, characterized by the metering zone being impregnated with a colorant, oxidizing, precipitating or buffering agent.

3. Test as per claim 2, characterized by the intermediate space being located within the identification zone containing a fixing agent for the colorant.

4. Test as per claim 1, characterized by the reaction zone containing as a suspension glucose oxidase which has been immobilized.

5. Test as per claim 1, characterized by an intermediate zone located between the metering zone and the reaction zone.

6. Test as per claim 5, wherein said intermediate zone is different in color from said metering zone and said reaction zone.

7. Test as per claim 5, wherein said intermediate zone is saturated with reagents for buffering and masking purposes.

8. Test as per claim 1, characterized by locating between the reaction zone and the identification zone an intermediate zone.

9. Test as per claim 8, wherein said intermediate zone further comprises buffering substances.

10. Test as per claims 5, 6, 7 or 8, characterized by the intermediate zones being of different widths.

11. Test as per claim 1, characterized by the capillary tube having an internal diameter of 1-3 mm and a length of 40-120 mm and being of glass or a plastic of glass-like transparency.

12. Test as per claim 11, wherein said internal diameter is 2.5 mm.

13. Test as per claim 11, wherein said length is 60 mm.