Measuring Membrane for an Optochamical or Amperometric Sensor

• US 20150068898A1
• Filed: 09/10/2014
• Published: 03/12/2015
• Est. Priority Date: 09/12/2013
• Status: Abandoned Application

• Current Assignee: Endress + Hauser Conducta Gesellschaft Fur Mess- Und Regeltechnik Mbh + Co. Kg
• Original Assignee: Endress + Hauser Conducta Gesellschaft Fur Mess- Und Regeltechnik Mbh + Co. Kg
• Inventors: Fanselow, Christian, Lobbert, Andreas
• Application Number:
  US14/482,188
• Publication Number:
  US 20150068898A1
• Time in Patent Office: Days
• US Class Current: 204/415
• CPC Class Codes: G01N 2021/775 Indicator and selective membrane
• CPC Class Codes: G01N 2021/7786 Fluorescence
• CPC Class Codes: G01N 21/75 Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated systems in which material is burnt in a flame or plasma G01N21/72, G01N21/73
• CPC Class Codes: G01N 21/77 by observing the effect on a chemical indicator
• CPC Class Codes: G01N 21/78 producing a change of colour
• CPC Class Codes: G01N 27/40 Semi-permeable membranes or partitions
• CPC Class Codes: G01N 27/404 Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid , e.g. Clark-type oxygen sensors

Abstract

A measuring membrane for an optochemical or amperometric sensor for determining or monitoring an analyte located in a medium, comprising a substrate material and a sensor element, which has at least one functional layer with a sensor-specific substance. The sensor element is embedded completely in a matrix, and the matrix is composed of a material, which at least in a portion facing the medium and adjoining the sensor element is permeable for the analyte.

Claims

1-21. -21. (canceled)

22. A measuring membrane for an optochemical or amperometric sensor for determining or monitoring an analyte located in a medium, comprising:

a substrate material; and

a sensor element, which has at least one functional layer with a sensor-specific substance, wherein;

said sensor element is embedded completely in a matrix; and

said matrix is composed of a material, which at least in a portion facing the medium and adjoining said sensor element is permeable for the analyte.

23. The measuring membrane as claimed in claim 22, wherein:

said matrix is connected in one of its surface regions physically or chemically with said substrate material.

24. The measuring membrane as claimed in claim 22, wherein:

said substrate material is at least partially embedded in said matrix and, in given cases, is permeable, at least in portions, for the analyte.

25. The measuring membrane as claimed in claim 22, wherein:

said sensor element has a layer structure and is composed of at least two functional layers; and

one of the functional layers contains the sensor-specific substance.

26. The measuring membrane as claimed in claim 22, wherein:

said sensor-specific substance is so embodied that it is selectively permeable for the analyte.

27. The measuring membrane as claimed in claim 22, wherein:

said sensor-specific substance is so embodied that it is changed in at least one of its chemical or physical properties by contact with the analyte, and wherein the change is detectable.

28. The measuring membrane as claimed in claim 22, wherein:

the material of said matrix is, at least in portions, permeable for the analyte.

29. The measuring membrane as claimed in claim 22, wherein:

used as material for said matrix is a material, which is chemically and physically stable relative to the measured medium and/or a cleaning medium.

30. The measuring membrane as claimed in claim 22, wherein:

used as material for said matrix is a material, which is suitable for applications in the foods field.

31. The measuring membrane as claimed in claim 22, wherein:

said substrate material is composed preferably of one of the following materials;

glass, ceramic, polymer, metal organic compound, and zeolite;

or

said substrate material has a hybrid structure and is preferably composed of at least two of the aforementioned materials.

32. The measuring membrane as claimed in claim 23, wherein:

said substrate material is embedded at least partially in said matrix and is permeable for the analyte.

33. The measuring membrane as claimed in claim 22, wherein:

said substrate material has a cavity in a region, in which said sensor element is arranged.

34. The measuring membrane as claimed in claim 22, further comprising:

a support grating and/or a holding grating, which are/is embedded in said matrix.

35. The measuring membrane as claimed in claim 22, wherein:

said sensor element is a multi-layer system comprising at least two sensor components.

36. The measuring membrane as claimed in claim 35, wherein:

said sensor components comprise a polymer layer with embedded pigments, a shade layer, a layer to prevent photo bleaching with optical sensors, a layer to increase or decrease the permeability of the analyte, a support layer, a holding layer, a layer selectively permeable to the analyte, and/or a layer to buffer the pH-value.

37. The measuring membrane as claimed in claim 35, wherein:

the multi-layer system comprising at least two sensor components is embedded into a sub matrix;

said sub matrix is embedded into an intermediate matrix, whereas said sub matrix and/or said intermediate matrix are embedded into said matrix.

38. The measuring membrane as claimed in claim 32, wherein:

at least one of the matrices;

said matrix, said sub matrix and/or said intermediate matrix comprise materials with different hydrophobia, especially Teflon or solgel.

39. A sensor cap comprising:

a cylindrical housing; and

arranged in an end region of said housing, a measuring membrane, comprising;

a measuring membrane for an optochemical or amperometric sensor for determining or monitoring an analyte located in a medium, comprising;

a substrate material; and

a sensor element, which has at least one functional layer with a sensor-specific substance, wherein;

said sensor element is embedded completely in a matrix; and

said matrix is composed of a material, which at least in a portion facing the medium and adjoining said sensor element is permeable for the analyte.

40. The sensor cap as claimed in claim 39, further comprising:

a lid with a central opening, which is securable in an end region of said cylindrical housing and which covers the surface of said measuring membrane in an edge region facing toward the medium.

41. The sensor cap as claimed in claim 39, wherein:

said measuring membrane is arranged air tightly in the sensor cap.

42. An amperometric or optochemical sensor having a measuring membrane comprising:

a substrate material; and

a sensor element, which has at least one functional layer with a sensor-specific substance, wherein;

said sensor element is embedded completely in a matrix; and

said matrix is composed of a material, which at least in a portion facing the medium and adjoining said sensor element is permeable for the analyte, or a sensor cap, comprising;

a cylindrical housing; and

arranged in an end region of said housing, a measuring membrane, comprising;

a measuring membrane for an optochemical or amperometric sensor for determining or monitoring an analyte located in a medium, comprising;

a substrate material; and

a sensor element, which has at least one functional layer with a sensor-specific substance, wherein;

said sensor element is embedded completely in a matrix; and

said matrix is composed of a material, which at least in a portion facing the medium and adjoining said sensor element is permeable for the analyte.