Arrangement for optical measuring of concentration of substances

• US 5,059,396 A
• Filed: 09/26/1988
• Issued: 10/22/1991
• Est. Priority Date: 12/06/1983
• Status: Expired due to Fees

• Current Assignee: Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften e.V. (Max-Planck-Gesellschaft zur Frderung der Wissenschaften e)
• Original Assignee: Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften e.V. (Max-Planck-Gesellschaft zur Frderung der Wissenschaften e)
• Inventors: Schrader, Bernhard, Lubbers, Dietrich W., Opitz, Norbert
• Primary Examiner(s): Fisher, Richard V.
• Assistant Examiner(s): BRUCKNER, JOHN
• Application Number:
  US07/249,586
• Time in Patent Office: 1,121 Days
• Field of Search: 422/82.11, 422/56, 422/57, 422/58, 422/68, 422/83, 422/86, 422/87, 422/91, 436/95, 436/113, 436/163, 436/169, 436/170, 128/633, 128/634, 250/338, 250/340, 250/343, 356/317, 356/318, 356/445, 350/96.29, 350/96.32, 350/96.33, 350/96.34
• US Class Current: 422/82.11
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: G01N 2021/0385 Diffusing membrane; Semipermeable membrane
• CPC Class Codes: G01N 21/3504 for analysing gases, e.g. multi-gas analysis
• CPC Class Codes: G01N 21/552 Attenuated total reflection
• CPC Class Codes: G01N 21/65 Raman scattering

Abstract

An arrangement for optical measuring concentration of substances has a measuring space which is composed of a material selectively permeable for particles to be measured, acting back on the particles and transparent for a measuring radiation, and a measuring space is arranged in working connection with the object to be measured and the measuring radiation passes through the measuring space. The measuring space has a layer that is a water-insoluble solvent or made of poly(ethylene terephthalate) or polytetrafluoroethylene. The layer excludes a reaction from the particles to be measured.

Claims

1. An arrangement for optical measuring concentration of substances, comprising means defining a measuring space composed of a material which is permeable for particles to be measured, said measuring space being transparent for a measuring radiation, said measuring space being water repellant and free from any indicator, said measuring space having a light conductor which has a refractive index greater than that of the measuring space and is not permeable for particles to be measured and that the measuring radiation passes through said measuring space by attenuated total reflection;

means for producing a testing light, which is an infrared radiation; and

a layer arranged to be in connection with said measuring space, said layer excluding a reaction from the particles to be measured, said layer being composed of a water-insoluble solvent.

2. An arrangement as defined in claim 1, wherein the measuring space material is selected measured.

3. An arrangement as defined in claim 2, wherein said measuring space materials are selected from the group consisting of silicon, polyvinylchloride, polystyrene, and polypropylene.

4. An arrangement as defined in claim 1, wherein said measuring space contains measuring fields for the particles to be measured.

5. An arrangement as defined in claim 4;

and further comprising a radiation source providing the measuring radiation and formed to produce different wavelengths.

6. An arrangement as defined in claim 1, wherein said light conductor has a surface provided with said measuring space.

7. An arrangement as defined in claim 6, wherein said light conductor is a dip stick covered with a mirror.

8. An arrangement as defined in claim 6, wherein said light conductor is an elongated light conductor.

9. An arrangement as defined in claim 1, wherein said measuring space is cylindrical, said light conductor being arranged tangentially to said measuring space for producing the measuring radiation through the light conductor to the measuring space.

10. An arrangement as defined in claim 1, wherein said measuring space material has absorption points for absorption of the particles to be measured.

11. An arrangement as defined in claim 1, wherein said layer is connected with said measuring space by an adhesive agent.

12. An arrangement as defined in claim 1, wherein said measuring space is spherical, said light conductor being arranged tangentially relative to said spherical measuring space for passing the measuring radiation through the light conductor to the measuring space.

13. An arrangement as defined in claim 1, wherein said measuring space material displaces a wavelength of absorption of the particles to be measured.

14. An arrangement as defined in claim 1, wherein said measuring space contains a substance forming a porous meshwork.

15. An arrangement as defined in claim 1, wherein said measuring space has a carrier for the particles to be measured.

16. An arrangement as defined in claim 1, wherein said light conductor is composed of a material selected from the group consisting of thalliumbromide-iodide or calcium fluoride.

17. An arrangement as defined in claim 1, wherein said layer is composed of dioctylphtalate.

18. An arrangement as defined in claim 17, wherein said light conductor is connected with said measuring space by an adhesive agent.

19. An arrangement as defined in claim 17, wherein said light conductor is composed of a material selected from the group consisting of thalliumbromide-iodide or calciumfluoride.

20. An arrangement for optical measuring concentration of substances, comprising means defining a measuring space composed of a material which is permeable for particles to be measured, said measuring space being transparent for a measuring radiation, said measuring space being water repellant and free from any indicator, said measuring space having a light conductor which has a refractive index greater than that of the measuring space and is not permeable for particles to be measured and that the measuring radiation passes through said measuring space by attenuated total reflection;

means for producing a testing light, which is an infrared radiation; and

a layer arranged to be in connection with said measuring space, said layer excluding a reaction from the particles to be measured, said layer being composed of a material selected from the group consisting of tetrafluoroethylene and poly(ethylene terephthalate).

21. An arrangement as defined in claim 20, wherein the said measuring space contains a material which is selected so that it has a high solubility coefficient for the particles to be measured.

22. An arrangement as defined in claim 21, wherein said measuring space materials are selected from the group consisting of silicon, polyvinylchloride, polystyrene and polypropylene.

23. An arrangement as defined in claim 20, wherein said measuring space has fielding and measuring fields are formed selectively for the particles to be measured.

24. An arrangement as defined in claim 23;

and further comprising a radiation source providing the measuring radiation and formed to produce different wavelengths.

25. An arrangement as defined in claim 24, wherein said radiation source is formed so that one of said wavelengths provided by said radiation source has a reference wavelength.

26. An arrangement as defined in claim 20, wherein said light conductor has a surface provided with said measuring space.

27. An arrangement as defined in claim 26, wherein said light conductor is a dip stick covered with a mirror.

28. An arrangement as defined in claim 26, wherein said light conductor is an elongated light conductor.

29. An arrangement as defined in claim 20, wherein said measuring space is cylindrical, said light conductor being arranged tangentially to said measuring space for passing the measuring radiation through the light conductor to the measuring space.

30. An arrangement as defined in claim 20, wherein said measuring space is spherical, said light conductor being arranged tangentially relative to said spherical measuring space for passing the measuring radiation through the light conductor to the measuring space.

31. An arrangement as defined in claim 20, wherein said measuring space material has absorption points for absorption of the particles to be measured.

32. An arrangement as defined in claim 20, wherein said measuring space material displaces a wavelength of absorption of the particles to be measured.

33. An arrangement as defined in claim 20, wherein said measuring space contains a substance forming a porous meshwork.

34. An arrangement as defined in claim 20, wherein said measuring space has a carrier for the particles to be measured.