Cuvette for the photo determination of chemical components in fluids

• US 4,582,684 A
• Filed: 09/12/1983
• Issued: 04/15/1986
• Est. Priority Date: 09/11/1982
• Status: Expired due to Term

• Current Assignee: Boehringer Mannheim GmbH (Roche Holding AG)
• Original Assignee: Boehringer Mannheim GmbH (Roche Holding AG)
• Inventors: Vogel, Peter, Rittersdorf, Walter
• Primary Examiner(s): Turk, Arnold
• Application Number:
  US06/531,439
• Time in Patent Office: 946 Days
• Field of Search: 422/102, 422/58, 422/56, 422/57, 422/61, 356/246
• US Class Current: 422/412
• CPC Class Codes: G01N 21/03 Cuvette constructions
• CPC Class Codes: G01N 31/22 using chemical indicators G01N31/02 takes precedence
• CPC Class Codes: G01N 33/525 Multi-layer analytical elements

Abstract

A cuvette for the determination of a chemical component of a fluid by photo evaluation has two planar-shaped parts parallel to one another at least one of which is transparent in the spectral range used for the evaluation. A planar distance piece of a filamentary reticulation for receiving the fluid therein spaces the planar-shaped parts apart to set the length of the light path through the cuvette for the photo evaluation.

Claims

1. A cuvette for the determination of a chemical component of a fluid by photometric evaluation through the fluid, comprising:

two, non-adsorbent, planar-shaped parts at least one of which is transparent in the spectral range used for the evaluation, the planar-shaped parts being joined together at less than all their perimeters; and

a similarly-transparent, substantially-planar distance piece comprising a filamentary reticulation between the two planar-shaped parts for receiving the fluid and spacing the planar-shaped parts in parallel to one another by the thickness of the distance piece across a sufficient number of filaments to thereby determine a definite path length of light through the cuvette for the evaluation.

2. The cuvette of claim 1, wherein the distance piece is one of a monofilar and multifilar fabric of from about 30μ

to about 500μ

thick of synthetic resin filaments of from about 10μ

to about 200μ

thick.

3. The cuvette of claim 1, and additionally comprising a reagent for reaction with the fluid for the evaluation on a surface of at least one of the two planar-shaped parts facing a surface of the other.

4. The cuvette of claim 2, and additionally comprising a reagent for reaction with the fluid for the evaluation on a surface of at least one of the two planar-shaped parts facing a surface of the other.

5. The cuvette of claim 1, and additionally comprising an absorbent fluid-reception member in fluid communication with the distance piece.

6. The cuvette of claim 2, and additionally comprising an absorbent fluid-reception member in fluid communication with the distance piece.

7. The cuvette of claim 3, and additionally comprising an absorbent fluid-reception member in fluid communication with the distance piece.

8. The cuvette of claim 4, and additionally comprising an absorbent fluid-reception member in fluid communication with the distance piece.

9. The cuvette of claim 5, wherein the absorbent fluid-reception member comprises means operative on the fluid for at least one of reaction therewith and separation of components thereof.

10. The cuvette of claim 6, wherein the absorbent fluid-reception member comprises means operative on the fluid for at least one of reaction therewith and separation of components thereof.

11. The cuvette of claim 7, wherein the absorbent fluid-reception member comprises means operative on the fluid for at least one of reaction therewith and separation of components thereof.

12. The cuvette of claim 8, wherein the absorbent fluid-reception member comprises means operative on the fluid for at least one of reaction therewith and separation of components thereof.

13. The cuvette of claim 5 wherein the fluid-reception member is at least partly uncovered by at least one of the planar-shaped parts, whereby to provide access thereto for receiving the fluid.

14. The cuvette of claim 6 wherein the fluid-reception member is at least partly uncovered by at least one of the planar-shaped parts, whereby to provide access thereto for receiving the fluid.

15. The cuvette of claim 7 wherein the fluid-reception member is at least partly uncovered by at least one of the planar-shaped parts, whereby to provide access thereto for receiving the fluid.

16. The cuvette of claim 8 wherein the fluid-reception member is at least partly uncovered by at least one of the planar-shaped parts, whereby to provide access thereto for receiving the fluid.

17. The cuvette of claim 1, wherein one of the planar-shaped parts extends beyond the other for providing a handle to the cuvette.

18. The cuvette of claim 2, wherein one of the planar-shaped parts extends beyond the other for providing a handle to the cuvette.

19. The cuvette of claim 5, wherein one of the planar-shaped parts extends beyond the other for providing a handle to the cuvette.

20. The cuvette of claim 16, wherein one of the planar-shaped parts extends beyond the other for providing a handle to the cuvette.