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Dissolved oxygen electrode

A technology of dissolved oxygen electrode and electrode core, which is applied to electrochemical variables of materials, material analysis by electromagnetic means, measurement devices, etc. Short time, high stability and reproducibility, high sensitivity effect

Inactive Publication Date: 2006-06-21
JIANGSU JIANGFEN ELECTROANALYTICAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The working electrode of the existing dissolved oxygen electrode is generally formed by encapsulating metal platinum in glass. When the working electrode is in the monitoring state for a long time, the surface of the platinum is prone to passivation when it is corroded, and the sensitivity is reduced.
In addition, there are only working electrode and reference electrode in the dissolved oxygen electrode. The reference electrode will undergo oxidation reaction during long-term continuous monitoring, which will cause the electrode potential to change and cause the measurement result to shift, and the accuracy of oxygen measurement will be further reduced.

Method used

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  • Dissolved oxygen electrode

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Embodiment Construction

[0009] according to figure 1 As shown, a dissolved oxygen electrode is mainly composed of a working electrode 2, a silver-silver chloride reference electrode 3 and an auxiliary electrode 7, and the upper ends of the three electrodes are connected with electrode lead wires. The working electrode 2 is metal gold, and the metal gold is encapsulated by a polyether ether ketone electrode core 10 . The electrode core 10 is a stepped cylinder, the lower end is the thinnest, the middle part is slightly thicker, and the upper part is the thickest. The working electrode 2 is wrapped around the thinnest part of the electrode core 10 , and a part is exposed outside the electrode core 10 , and the reference electrode 3 surrounds the surface of the electrode core 10 wrapped with the working electrode 2 . An auxiliary electrode 7 is installed in the slightly thicker middle part of the electrode core body 10 , and the auxiliary electrode 7 extends out of the electrode core body 10 and is arr...

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Abstract

The invention discloses a dissolved oxygen electrode, which consists of working electrode (2) and silver-silver chloride reference electrode (3), wherein two electrodes connect the electrode lead; the working electrode (2) is metal gold, which is packed by polyetheretherketone electrode chip (10) with part of electrode chip (10) outsides; encircling the reference electrode (3) on the surface of electrode chip (10); connecting the top of electrode chip (10) with the electrode cap (5) with the bottom in the oxygen penetration film sleeve (1) and connecting; placing the working electrode (2) and reference electrode (3) in the oxygen penetration film sleeve (1); setting the oxygen penetration film (8) at the bottom of oxygen penetration film sleeve (1). The invention improves the corrosion-proof property and sensibility, which is fit for on-line measurement of dissolved oxygen density.

Description

technical field [0001] The invention relates to a dissolved oxygen electrode. Background technique [0002] Dissolved oxygen refers to molecular oxygen dissolved in water or liquid phase, which is an indispensable condition for the survival of aquatic organisms and aquatic plants. The determination of dissolved oxygen concentration is of great significance in the fields of industry, medicine, environmental monitoring, aquaculture, etc. It is one of the important indicators of water pollution. Modern industry and environmental monitoring more and more need on-site online monitoring. However, the working electrode of the existing dissolved oxygen electrode is generally formed by encapsulating metal platinum in glass. When the working electrode is in the monitoring state for a long time, the surface of the platinum is easily passivated when it is corroded, and the sensitivity is reduced. In addition, there are only the working electrode and the reference electrode in the diss...

Claims

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Application Information

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IPC IPC(8): G01N27/31G01N27/30G01N27/409
Inventor 朱培德陈勇王正林杨连喜
Owner JIANGSU JIANGFEN ELECTROANALYTICAL INSTR
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