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Polymeric electrolyte, half-cell for electrochemical measurements and its use

A technology that refers to half-cells and polymers. It is applied in the direction of electrochemical variables of materials, material analysis through electromagnetic means, and measurement devices. It can solve problems such as low polarity, poor hydrolytic stability, and insufficient stability levels.

Active Publication Date: 2009-08-19
METTLER TOLEDO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Disadvantages of the monomers used in the prior art for electrodes are that the polymer electrolytes produced therefrom have insufficient levels of stability to acids and bases, poor hydrolytic stability and low polarity

Method used

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  • Polymeric electrolyte, half-cell for electrochemical measurements and its use

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Embodiment

[0020] The polymeric reference system prepared according to the following example has a very stable potential compared to a conventional liquid Ag / AgCl reference half cell. The only small differences between the potentials are due to small differences in the activity of the chloride ions. Because of these advantageous properties, the system described here is very suitable for use as a reference half-cell, for example, in a potentiometric chain.

[0021] To manufacture a preferred type of polymer electrolyte according to the present invention, a monomer solution was formulated according to the composition in the table below and homogenized while cooling to 15 to 20°C. The mixture obtained in this way was filled into an electrode with a tubular glass envelope. Polymerization is initiated by subsequent heat treatment of the filled electrode and a polymer electrolyte is formed.

[0022] Unlike the reference values ​​for conventional sleeve connections, the measured electrochemic...

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Abstract

Polymer electrolyte (A) for an electrochemical half-cell, especially a reference half-cell, contains a polymer (I) produced by polymerization of N-acryloylaminoethoxyethanol (I), optionally together with at least one additional monomer. An independent claim is also included for a half-cell for electrochemical measurements that contains (A).

Description

technical field [0001] The invention relates to an electrochemical half-cell containing a polymer electrolyte and to the use of the half-cell and the polymer electrolyte. Background technique [0002] The known prior art includes various types of half-cells for electrochemical measurements, for example for potentiometric or amperometric measurements. These half-cells can be specially configured as reference electrodes, which are used in combination with potentiometric or amperometric sensors. An important feature of these reference electrodes is that they provide as constant a reference potential as possible. [0003] In one of the various types of reference electrodes, a liquid reference electrolyte, for example an aqueous solution of potassium chloride in contact with the liquid measuring medium via a liquid connection (also called "liquid junction"), is contained in the housing. In order to avoid or reduce an undesired exchange of substances between the measuring medium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
CPCG01N27/30G01N27/301
Inventor 菲利普·埃里斯曼沃尔夫冈·哈勒尔
Owner METTLER TOLEDO INC