Heterogeneous membrane electrodes

Patent metadata

Field	Value
Publication number	US-2018321175-A1
Application number	US-201816040024-A
Country	US
Kind code	A1
Filing date	Jul 19, 2018
Priority date	Dec 2, 2002
Publication date	Nov 8, 2018
Grant date	—

Abstract

The present invention relates to planar electrochemical sensors with membrane coatings used to perform chemical analyses. The object of this invention is to provide unit-use disposable sensors of very simple and inexpensive construction, preferably with only a single membrane coating on an electrode. The invented devices are potentiometric salt-bridge reference electrodes and dissolved gas sensors constructed with a heterogeneous membrane coating of a conductor. The heterogeneous membrane, which is an intimate admixture of a hydrophobic and a hydrophilic compartment, concurrently supports constrained transport of non-volatile species through its hydrophilic compartment and rapid gas and water vapor transport through its hydrophobic compartment.

First claim

1 .- 9 . (canceled)

10 . A method of manufacturing a heterogeneous membrane, comprising the steps of
dissolving components of the hydrophilic compartment in an aqueous solution; premixing components of an oil phase of the emulsion; admixing the aqueous solution and oil phase to a smooth blend avoiding foam formation; emulsifying the resulting mixture; and printing the emulsified membrane components onto an electrode carrier.

11 . The method of claim 10 , wherein the emulsified membrane components are applied to the electrode carrier by one of pin transfer printing and micro dispensing.

12 . The method of claim 10 , wherein the components of the hydrophilic compartment include a hydrophilic binder polymer, an emulsifier and a salt.

13 . The method of claim 10 , wherein the oil phase of the emulsion includes a hydrophobic polymer.

14 . The method of claim 13 , wherein the oil phase further includes a cross-linker.

15 . The method of claim 10 , wherein the step of emulsifying is carried out on ice and the shear rate during the emulsifying is gradually increased until a specific surface area of about 2, 5 m2/ml is achieved, corresponding to a mean particle dimension of less than 1 micrometer.

16 .- 22 . (canceled)

Assignees

• Siemens Healthcare Diagnostics Inc

Inventors

• Lauks Imants
• Varlan Anca
• Oussova Alexandra
• Bales Michael

Classifications

• B01L2300/0645

  Electrodes · CPC title

• B01L2400/0683

  mechanically breaking a wall or membrane within a channel or chamber · CPC title

• B01L2300/0883

  Serpentine channels · CPC title

• B01L2300/0825

  Test strips · CPC title

• B01L3/502715

  characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces · CPC title