Quantitative analysis film

• US 4,503,145 A
• Filed: 02/26/1982
• Issued: 03/05/1985
• Est. Priority Date: 02/27/1981
• Status: Expired due to Term

• Current Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Amano, Yoshikazu, Katsuyama, Harumi, Kondo, Asaji
• Primary Examiner(s): Turk, Arnold
• Application Number:
  US06/352,970
• Time in Patent Office: 1,103 Days
• Field of Search: 435/16, 435/25, 435/28, 435/805, 422/56, 422/57, 422/58, 436/66, 436/95, 436/170, 436/135
• US Class Current: 435/16
• CPC Class Codes: C12Q 1/26 involving oxidoreductase
• CPC Class Codes: C12Q 1/52 involving transaminase
• CPC Class Codes: Y10S 435/805 Test papers

Abstract

An analysis film for assaying transaminase activity comprises a reagent layer containing pyruvic acid oxidase, a combination of a hydrogen donor and a coupler--which is capable of forming a cationic dye--and an anionic polymer. The cationic dye formed by the reaction with a color indicator composition for detecting hydrogen peroxide is fixed with the anionic polymer, thereby mobilization and diffusion of the cationic dye being prevented so that the analysis film achieves high detection sensitivity and high accuracy.

Claims

1. An analysis film comprising a reagent layer containing a transaminase substrate composition, a pyruvic acid oxidase composition, a cationic dye-forming color indicator for detecting hydrogen peroxide, and an anionic polymer containing a sulfonate group capable of reacting with formed cationic dye to fix the formed dye.

2. The analysis film of claim 1 wherein said pyruvic acid oxidase composition includes pyruvic acid oxidase, a phosphate source compound, flavine adenine dinucleotide, thiamine pyrophosphate, and a divalent or trivalent metal ion.

3. The analysis film of claim 2 wherein said color indicator composition for detecting hydrogen peroxide comprises a substance having peroxidase activity, a hydrogen donor and a coupler.

4. The analysis film of any one of claims 1, 2 or 3 wherein said reagent layer is a single layer.

5. The analysis film of any one of claims 1, 2 or 3 wherein said reagent layer is composed of at least two layers one of which is a transaminase substrate layer containing a transaminase substrate and one of which is a pyruvic acid oxidase color forming reaction dye fixing layer comprising a pyruvic acid oxidase composition, a color indicator and an anionic polymer.

6. The analysis film of any one of claims 1, 2 or 3 wherein said reagent layer comprises at least two layers one of which is a dye fixing layer containing an anionic polymer and one of which is a transaminase substrate-pyruvic acid oxidase color forming reaction layer comprising a transaminase substrate composition, a pyruvic acid oxidase composition and a color indicator.

7. The analysis film of any one of claims 1, 2 or 3 wherein said reagent layer possesses a support on one surface thereof and a porous layer on the other surface thereof and said porous layer is adhered to said reagent layer in a fluid contact as an integral form.