Flow-through type hydrogen peroxide electrode

• US 5,182,004 A
• Filed: 11/15/1989
• Issued: 01/26/1993
• Est. Priority Date: 12/10/1988
• Status: Expired due to Fees

• Current Assignee: Horiba Limited
• Original Assignee: Horiba Limited
• Inventors: Kohno, Takeshi
• Primary Examiner(s): TUNG, TA HSUNG
• Application Number:
  US07/437,346
• Time in Patent Office: 1,168 Days
• Field of Search: 204/400, 204/403, 204/408, 204/409, 204/415-420, 204/435, 204/153.12
• US Class Current: 204/403.05
• CPC Class Codes: G01N 27/3271 Amperometric enzyme electrodes for analytes in body fluids, e.g. glucose in blood amperometry per se G01N27/49; aspects concerning the enzyme reagent C12Q1/001
• CPC Class Codes: G01N 27/4045 for gases other than oxygen

Abstract

An improved flow-through type electrode assembly includes an insulating transparent housing member having a transverse sample liquid passageway. A hollow cylindrical cathode forms a portion of the passageway and is physically displaced from a removable anode member that can be resiliently positioned in the passageway. A series of similar electrode assemblies can be interconnected together.

Claims

1. An improved flow-through electrode assembly to directly position a cathode and anode electrode in contact with a sample liquid comprising:

an electrode housing body having an inlet port and an outlet port with a sample liquid passageway extending therebetween;

a cylindrical hollow metal cathode electrode positioned in the electrode body and forming a portion of said sample liquid passageway, only an interior portion of the cathode electrode being in liquid contact with the sample fluid;

a disc anode electrode removably position in the electrode body at a position downstream of the cathode electrode with a surface of the anode electrode in liquid contact with the sample liquid;

resilient means for resiliently mounting the anode electrode for sealing contact with the sample liquid passageway, and

means for removably pressing the anode electrode against the resilient means, including

a support member contacting the anode electrode, and

force means on the electrode body for permitting an operator to progressively exert an increasing amount of force against the support member.

2. The improved flow-through electrode assembly of claim 1 wherein the electrode housing body is transparent.

3. The improved flow-through electrode assembly of claim 2 wherein the resilient means includes a packing member having a noncircular aperture that forms a portion of the sample liquid passageway.

4. The improved flow-through electrode assembly of claim 3, wherein the electrode housing body has a cavity extending transverse to the sample liquid passageway from a surface of the electrode housing body, intermediate the inlet body and the outlet port, the packing member is positioned at the bottom of the cavity and the support member is journalled in the cavity, and the force means for removably pressing the anode electrode includes a cap member with threads and corresponding threads in the cavity.

5. The improved flow-through electrode assembly of claim 4 further including a temperature compensating member positioned adjacent the anode electrode.

6. An improved flow-through electrode assembly to directly position a cathode and anode electrode in contact with a sample liquid comprising:

a plastic transparent electrode housing body having an inlet port and an outlet port with a sample liquid passageway extending therebetween, and a cavity extending from, and transverse to, the sample liquid passageway from a surface of the electrode housing body, intermediate the inlet port and the outlet port;

a cylindrical hollow metal cathode electrode positioned in the electrode body and forming a portion of said sample liquid passageway, only an interior portion of the cathode electrode being in liquid contact with the sample fluid;

a support body removably mounted in the transverse cavity of the housing body;

a disc anode electrode removably positioned in the electrode body at a position where the transverse cavity intersects the sample liquid passageway downstream of the cathode electrode with a surface of the anode electrode in liquid contact with the sample liquid, the support body having a lower surface configuration to receive and support the anode electrode;

an electrical connector extending through the support body and connected to the anode electrode;

resilient means positioned at the bottom of the transverse cavity for resiliently mounting the anode electrode to provide a sealing contact with the sample liquid passageway, and

means for removably pressing the anode electrode against the resilient means by exerting a force on the support body.

7. The improved flow-through electrode assembly of claim 6 wherein an upper portion of the transverse cavity is threaded and a corresponding threaded cap member is threaded into the transverse cavity to exert said force on the support body.

8. The improved flow-through electrode assembly of claim 7 further including a temperature compensating member positioned adjacent the anode electrode.