Reagent test device containing hydrophobic barriers

• US 4,618,475 A
• Filed: 08/30/1985
• Issued: 10/21/1986
• Est. Priority Date: 08/30/1985
• Status: Expired due to Fees

• Current Assignee: Miles Laboratories, Inc. (Bayer AG)
• Original Assignee: Miles Laboratories, Inc. (Bayer AG)
• Inventors: Wang, Joseph Y.
• Primary Examiner(s): Turk, Arnold
• Application Number:
  US06/771,061
• Time in Patent Office: 417 Days
• Field of Search: 422/56, 422/57, 422/58, 436/169, 436/170, 435/805
• US Class Current: 422/424
• CPC Class Codes: G01N 33/525 Multi-layer analytical elements
• CPC Class Codes: Y10S 435/805 Test papers

Abstract

Reagent test device are prepared in which reagent carrier matrices are separated from each other by hydrophobic barrier pads of identical height to the reagent carrier matrices such that liquid present in a reagent matrix material is retained therein and prevented from running over into another reagent matrix area present on the same test device.

Claims

1. A reagent test device comprising multiple reagent carrier matrices attached in spaced relationship to one side of a substrate, with hydrophobic barrier pads of identical height to the reagent carrier matrices attached to the same side of the substrate between the reagent carrier matrices and in physical contact with the reagent carrier matrices to protect the reagent carrier matrices from abrasion and to prevent liquid runover between adjoining spaced carrier matrices.

2. The reagent test device of claim 1 in which the reagent carrier matrices and the barrier pads are attached to the substrate by means of adhesive.

3. The test device of claim 1 in which the reagent carrier matrix is filter paper.

4. The test device of claim 1 in which the reagent carrier matrix is porous hydrophilic film.

5. The test device of claim 1 in which the substrate is polystyrene.

6. The test device of claim 1 in which the substrate is polyvinylchloride.

7. The test device of claim 1 in which the barrier pad is polystyrene.

8. The test device of claim 1 in which the barrier pad is silica impregnated in an acrylic polymer.