Method for producing an ise half-cell, ise half-cell, sensor, and multi-parameter sensor

Patent metadata

Field	Value
Publication number	US-2019049402-A1
Application number	US-201816103816-A
Country	US
Kind code	A1
Filing date	Aug 14, 2018
Priority date	Aug 14, 2017
Publication date	Feb 14, 2019
Grant date	—

Abstract

The present disclosure discloses a method for producing an ISE half-cell, including the steps of: immersing a first end of a hollow body into a membrane solution comprising at least one solvent and an ion-specific ionophore; removing the hollow body from the membrane solution; drying the hollow body and evaporating the solvent from the membrane solution, whereby an ion-selective membrane is created at the immersed end of the hollow body; and completing the hollow body to make an ISE half-cell. The present disclosure also discloses an ISE half-cell that is produced according to such a method. The present disclosure further discloses a sensor and a multiparameter sensor comprising several such ISE half-cells.

First claim

Claimed is:

1 . A method for producing an ISE half-cell, including the steps of:
immersing a first end of a hollow body into a membrane solution comprising at least one solvent and an ion-specific ionophore; removing the hollow body from the membrane solution; drying the hollow body and evaporating the solvent from the membrane solution, whereby an ion-selective membrane is created at the first end of the hollow body, and completing the hollow body to make an ISE half-cell.

2 . The method according to claim 1 , wherein the steps of immersing and drying are executed multiple times.

3 . The method according to claim 1 , wherein the membrane solution comprises a polymer solution.

4 . The method according to claim 1 , further including a step of:
performing a microscopic surface modification on the hollow body.

5 . The method according to claim 1 , further including a step of:
immersing the hollow body with the membrane into an additional solution in order to apply a functional layer, an anti-fouling layer, or a layer with a low wetting capability of the surface.

6 . The method according to claim 5 , further including a step of:
introducing a metallic support structure onto or into the ion-selective membrane.

7 . The method according to claim 1 , further including a step of:
applying an overpressure at the first end or at a second end of the hollow body after immersing and removing the hollow body relative to the membrane solution.

8 . The method according to claim 1 , wherein completing the hollow body to make an ISE half-cell includes at least one of the steps of:
filling an inner electrolyte into the hollow body; and introducing a reference electrode into the interior of the hollow body.

9 . A method according to claim 1 , wherein completing the hollow body to make an ISE half-cell includes a step of:
attaching the hollow body to an electrode shaft that can be filled with an inner electrolyte.

10 . An ion-selective half-cell that is produced from a method including steps of:
immersing a first end of a hollow body into a membrane solution comprising at least one solvent and an ion-specific ionophore; removing the hollow body from the membrane solution; drying the hollow body and evaporating the solvent from the membrane solution, creating an ion-selective membrane at the immersed end of the hollow body; and completing the hollow body to make an ISE half-cell.

11 . The ion-selective half-cell according to claim 10 , wherein the hollow body comprises at least one of:
a furrow, a groove, a score, a rib, a flute, a notch, and an undercut.

12 . The ion-selective half-cell according to claim 10 , further including a support structure on or in the membrane.

13 . The ion-selective half-cell according to claim 10 , wherein the internal diameter of the hollow body is less than or equal to 10 mm.

14 . The ion-selective half-cell according to claim 10 , wherein the hollow body is manufactured from glass, plastic, or a ceramic.

15 . The ion-selective half-cell according to claim 10 , wherein the shape of the membrane is hemispherical or in the form of a drop.

16 . The ion-selective half-cell according to claim 10 , further including a sensor comprising the ion-selective half-cell.

17 . The ion-selective half-cell according to claim 16 , wherein an external diameter of the sensor is less than or equal to 12 mm.

18 . The ion-selective half-cell according to claim 16 , wherein the sensor comprises a reference half-cell.

19 . The ion-selective half-cell according to claim 16 , wherein the sensor comprises an inductive plug head for connection to a transmitter.

20 . A multi-parameter sensor comprising:
at least two ion-selective half cells, wherein the ion-selective half-cells are produced from a method including the steps of:
immersing a first end of a hollow body into a membrane solution comprising at least one solvent and an ion-specific ionophore;
removing the hollow body from the membrane solution; drying the hollow body and evaporating the solvent from the membrane solution; creating an ion-selective membrane at the immersed end of the hollow body; and completing the hollow body to make an ISE half-cell.

21 . The multi-parameter sensor of claim 20 , further comprising a reference half-cell

22 . The multi-parameter sensor of claim 20 , wherein the multi-parameter sensor comprises a pH sensor, and the multi-parameter sensor utilizes the reference half-cell of the pH sensor as its reference.

23 . The multi-parameter sensor of claim 20 , wherein the multi-parameter sensor comprises a pH sensor, and the multi-parameter sensor utilizes the reference half-cell of the pH sensor as its reference.

24 . The multi-parameter sensor of claim 20 , wherein the multi-parameter sensor has an external diameter of less than or equal to 40 mm.

Assignees

• Endress Hauser Conducta Gmbh Co Kg

Inventors

• Petzold Holm
• Vettermann Jens
• Hennings Erik

Classifications

• G01N27/301

  Reference electrodes · CPC title

• G01N27/302 Primary

  pH sensitive, e.g. quinhydron, antimony or hydrogen electrodes (ion selective electrodes G01N27/333, glass electrodes G01N27/36) · CPC title

• G01N27/3335 Primary

  the membrane containing at least one organic component (G01N27/3271 takes precedence; aspects concerning the enzyme reagent in enzyme electrodes C12Q1/001) · CPC title

• G01N27/31 Primary

  Half-cells with permeable membranes, e.g. semi-porous or perm-selective membranes · CPC title

• G01N27/413

  Concentration cells using liquid electrolytes {measuring currents or voltages in voltaic cells} · CPC title