Detection device

• US 8,999,124 B2
• Filed: 03/02/2011
• Issued: 04/07/2015
• Est. Priority Date: 03/03/2010
• Status: Active Grant

• Current Assignee: Nippon Kayaku Company Limited
• Original Assignee: Nippon Kayaku Company Limited
• Inventors: Yokoyama, Takao, Machida, Reiko, Irie, Yayoi, Umegae, Yoshihiko
• Primary Examiner(s): DIETERLE, JENNIFER M
• Application Number:
  US13/582,257
• Publication Number:
  US 20120325658A1
• Time in Patent Office: 1,497 Days
• Field of Search: 20440301-40315, 422/82.01, 422/68.1, 435/287.1
• US Class Current: 204/403.01
• CPC Class Codes: B01L 2200/027 for microfluidic devices
• CPC Class Codes: B01L 2300/0645 Electrodes
• CPC Class Codes: B01L 2300/0825 Test strips
• CPC Class Codes: B01L 2400/0406 capillary forces
• CPC Class Codes: B01L 2400/0475 specific mechanical means and fluid pressure
• CPC Class Codes: B01L 2400/065 sliding valves
• CPC Class Codes: B01L 3/502715 characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces
• CPC Class Codes: B01L 3/502738 characterised by integrated valves microvalves F16K99/0001
• CPC Class Codes: G01N 21/78 producing a change of colour
• CPC Class Codes: G01N 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52
• CPC Class Codes: G01N 35/1016 Control of the volume dispensed or introduced

Abstract

A detection device that is used to detect a sample includes: a base component having on its surface a sample supply position to which the sample is supplied; an electrode system formed at a distance from the sample supply position on the surface of the base component; a sliding component having a slide body that performs a sliding movement over the surface of the base component, a sample receptacle portion provided in a portion of the slide body; and a supporting portion that is fixed to the base component and supports the sliding component such that it can perform the sliding movement relative to the base component. The base and the sliding components can perform the sliding movement within a range that includes an overlap position, where the sample receptacle portion overlaps with the electrode system, and the sample supply position.

Claims

1. A detection device that is used to detect a sample, comprising:

a base component that is non-conductive and has on its surface a sample supply position to which the sample is supplied;

a detecting section that is formed at a distance from the sample supply position on the surface of the base component, and has an electrode system that includes a working electrode, a reference electrode, and a counter electrode that are formed on the surface of the base component at a distance from the sample supply position;

a sliding component having a slide body that performs a sliding movement over the surface of the base component, and also having a sample receptacle portion that is provided in a portion of the slide body and is capable of containing the sample, said sliding component also having a flow stopping portion positioned between an overlap position and a sample supply position when the sample receptacle portion is located at the sample supply position, said flow stopping portion stopping the flow of the sample from the sample receptacle portion to the electrode system formed in a portion of the slide body; and

a supporting portion that is fixed to the base component and supports the sliding component such that it is capable of performing the sliding movement relative to the base component, wherein the base component and the sliding component are able to perform the sliding movement within a range that includes the overlap position, where the sample receptacle portion overlaps with the detecting section, and the sample supply position, wherein

the flow stopping portion is formed on the sliding component so as to protrude from the sliding component in the direction of the base component when the sliding component is mounted on the base component.

2. A detection device that is used to detect a sample, comprising:

a base component that is non-conductive and has on its surface a sample supply position to which the sample is supplied;

a detecting section that is formed at a distance from the sample supply position on the surface of the base component, and has an electrode system that includes a working electrode, a reference electrode, and a counter electrode that are formed on the surface of the base component at a distance from the sample supply position;

a sliding component having a slide body that performs a sliding movement over the surface of the base component, and also having a sample receptacle portion that is provided in a portion of the slide body and is capable of containing the sample, said sliding component also having a flow stopping portion positioned between an overlap position and a sample supply position when the sample receptacle portion is located at the sample supply position, said flow stopping portion stopping the flow of the sample from the sample receptacle portion to the electrode system formed in a portion of the slide body; and

a supporting portion that is fixed to the base component and supports the sliding component such that it is capable of performing the sliding movement relative to the base component,

wherein the base component and the sliding component are able to perform the sliding movement within a range that includes the overlap position, where the sample receptacle portion overlaps with the detecting section, and the sample supply position, and

wherein the flow stopping portion has a hole portion or a recessed portion in which, when viewed from a top direction of the detection device, at least a part of an edge portion thereof is positioned between the overlap position and the sample supply position when the sample receptacle portion is located at the sample supply position.

3. The detection device according to claim 2, wherein the detecting section is formed so as to be capable of making electrochemical measurements.

4. The detection device according to claim 2, wherein at least one of the mutually facing portions of the sample receptacle portion and the base component is formed such that at least a portion thereof is hydrophilic.

5. The detection device according to claim 2, wherein supporting portions are provided in two locations that are separated from each other such that the overlap position is sandwiched between them on the base component.

6. The detection device according to claim 2, wherein the supporting portion has guide portions, and these guide portions are separated from each other such that the overlap position is sandwiched between them on the base component, and the guide portions are also provided in parallel with each other.

7. The detection device according to claim 2, wherein the supporting portion has a covering portion that covers the overlap position such that a gap through which the sliding component is capable of moving backwards and forwards is created between the covering portion and the base component.

8. The detection device according to claim 2, wherein the sliding component has flow restricting portions between the slide body and the sample receptacle portion that restrict the flow of the sample from the sample receptacle portion towards the slide body.

9. The detection device according to claim 8, wherein the flow restricting portion is formed by cutting notches in a portion of the slide body adjacent to the sample receptacle portion.

10. The detection device according to claim 2, wherein a preprocessing reagent that is used in preprocessing in order to either remove or capture any interfering substances that may obstruct the detection, or to convert such interfering substances into another substance that has no effect on the detection is placed on at least one of the sample receptacle portion and the sample supply position.

11. The detection device according to claim 3, wherein at least one of the counter electrode and the reference electrode is a silver-silver chloride electrode which employs silver and silver chloride.

12. The detection device according to claim 2, further comprising:

a pair of conduction detecting electrodes that are located apart from each other and are exposed on the surface of the base component at the sample supply position, wherein the pair of conduction detecting electrodes are made conductive with each other by the sample that is supplied to the sample supply position.

13. The detection device according to claim 12, wherein a surface of the conduction detecting electrodes is hydrophilic.

14. The detection device according to claim 6, wherein the guide portions are hydrophobic.

15. The detection device according to claim, 2, wherein

an elongated hole that is elongated in a sliding direction in which the sliding component slides relative to the base component is formed in the base component;

and

a through hole that, when viewed from the thickness direction of the sliding component, overlaps with the elongated hole when the sliding component is being supported by the supporting portion is formed in the sliding component.

16. The detection device according to claim 3, wherein an oxidation-reduction enzyme and a redox mediator are placed on at least the working electrode of the electrode system.

17. The detection device according to claim 16, wherein the redox mediator includes at least one selected from ruthenium derivatives, osmium derivatives, ferricyan derivatives, ferrocene derivatives, quinine derivatives, phenothiazine derivatives, phenoxazine derivatives, phenazine derivatives, indophenol derivatives, diphenylamine derivatives, and phenol derivatives.

18. The detection device according to claim 16, wherein the oxidation-reduction enzyme includes at least one selected from pyranose oxidase, L-sorbose oxidase, 1,5-AG dehydrogenase, L-sorbose dehydrogenase, and 1,5-anhydroglucitol-6-phosphate dehydrogenase.

19. The detection device for performing 1,5 anhydroglucitol according to claim 10, wherein the preprocessing reagent contains a reagent that either removes or captures glucose, or else converts glucose into another substance that has no effect on the detection.