Chemical or microbiological test kit

• US 5,728,350 A
• Filed: 09/18/1996
• Issued: 03/17/1998
• Est. Priority Date: 08/21/1992
• Status: Expired due to Fees

• Current Assignee: Showa Yakuhin Kako Co., Ltd. (General Cannabis Corp.)
• Original Assignee: Showa Yakuhin Kako Co., Ltd. (General Cannabis Corp.)
• Inventors: Tanaka, Fumio, Shibuya, Chie, Kinoshita, Yuichi, Oguchi, Kiyoshi, Ohshina, Chizuko
• Primary Examiner(s): ALEXANDER, LYLE
• Application Number:
  US08/715,492
• Time in Patent Office: 545 Days
• Field of Search: 422/58, 422/61, 422/102, 436/808-810, 435/286.3, 435/288.2
• US Class Current: 422/412
• CPC Class Codes: C12Q 1/00 Measuring or testing processes involving enzymes, nucleic acids or microorganisms measuring or testing apparatus with condition measuring or sensing means, e.g. colony counters, C12M1/34; Compositions therefor; Processes of preparing such compositions
• CPC Class Codes: G01N 31/22 using chemical indicators G01N31/02 takes precedence
• CPC Class Codes: G01N 31/221 for investigating pH value
• CPC Class Codes: G01N 33/521 Single-layer analytical elements
• CPC Class Codes: G01N 33/525 Multi-layer analytical elements
• CPC Class Codes: Y10S 436/809 Multifield plates or multicontainer arrays

Abstract

A test kit for a chemical test or microbiological test, which comprises at least one independent sample-receiving part on a support is disclosed. The test kit of the present invention is usable for various chemical and microbiological tests which have been conducted with a plastic microplate and which have necessitated many reaction and culture steps in the prior art. The test kit of the present invention can be produced at an extremely low cost because of its structure. The test kit can previously contain a reagent necessitated for the test to remarkably facilitate the test.

Claims

1. A test kit for a chemical test or microbiological test, comprises (a) a platelike support of hydrophobic material (b) one or more independent sample-receiving parts each comprising (I) a part comprising a first hydrophilic, water absorbing material for absorbing a sample and a reagent for the chemical test or microbiological test and (II) a surrounding part comprising a second hydrophilic, water-absorbing material, which may or may not be the same as the first material, comprising a gel, said gel having water-absorbing, hydrophilic and water-retaining properties, which surrounds the part (I), is separated from the part (I), and prevents escape of the sample.

2. The test kit according to claim 1, wherein the materials of the sample receiving parts are applied by printing on said support resulting in a plurality of adjacent sample receiving parts, the area of the sample-receiving part is about 5 mm², the intervals between the adjacent sample-receiving parts are about 0.5 mm, and the thickness of the sample receiving parts are about 0.01 to 500 μ

m.

3. The test kit according to claim 1, wherein the material having water absorbing, hydrophilic and water retaining properties is selected from the group consisting of a polyvinyl alcohol/polyacrylate gel, crosslinked polyacrylate gel, crosslinked polyvinyl alcohol gel, crosslinked polyethylene oxide gel, crosslinked polydiethylacrylamide gel, cross linked polyisoproylacrylacide gel, crosslinked polyvinylpyrrolidone gel, crosslinked Paogen gel and mixtures thereof.

4. The test kit according to claim 1, wherein the material having water-absorbing, hydrophilic and water-retaining properties is selected from the group consisting of starch, agar, pullulan, casein, gelatin, crystalline cellulose, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, polyvinyl alcohol, polyethylene glycol, polypropylene glycol, polyacrylamide, polyacrylic acid, sodium polyacrylate, polyvinylpyrrolidone, Paogen, copolymers obtained by copolymerizing such a polymer with another monomer, acacia gum and mixtures thereof.

5. The test kit according to claim 4, wherein the material having water-absorbing, hydrophilic and water-retaining properties is selected from the group consisting of polyvinylpyrrolidone, hydroxyethylcellulose, hydroxypropylcellulose, polyethylene glycol, polyvinyl alcohol, Paogen and mixtures thereof.

6. The test kit according to claim 1, wherein the material having water-absorbing, hydrophilic and water-retaining properties, which forms the part (I), is selected from the group consisting of filter papers, pulp discs and spongy porous substances.

7. The test kit according to claim 6 wherein the surrounding part (II) has a circular shape having a diameter of about 3 to 20 mm or a rectangular shape having a side length of about 3 to 20 mm, and the thickness of the part being 0.5 to 3 mm.

8. The test kit according to claim 6, wherein the amount of a sample to be fed into each sample-receiving part is 0.005 to 0.1 ml.

9. The test kit according to claim 1, wherein the sample-receiving part contains a reagent for a chemical test or microbiological test.

10. The test kit according to claim 9, which has two or more sample-receiving parts each containing a different amount of a reagent.

11. The test kit according to claim 9, which has two or more sample-receiving parts each containing a different reagent.

12. The test kit according to claim 9, which is for the determination of antimicrobial susceptivility by a microdilution broth method.

13. The test kit according to claim 12, which has two or more sample-receiving parts containing antimicrobial drug in a gradationally changing amount.