Complete solid carbon dioxide electrochemical sensor

A carbon dioxide, sensor technology, applied in scientific instruments, instruments, material analysis by electromagnetic means, etc., can solve the problems of complex reaction mechanism of the sensor, undeveloped and other problems

Inactive Publication Date: 2005-09-14
GUANGZHOU SENSCN INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coupled with the complex reaction mechanism of this type of sensor and the influence of humidity in the actual system, this type of CO sensor with high practical value has not yet been developed. 2 sensor
The existence of these technical bottlenecks is the reason why there is no mature portable CO on the market 2 Reasons for Gas Detection Instruments

Method used

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  • Complete solid carbon dioxide electrochemical sensor

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Embodiment Construction

[0007] CO of the present invention 2 The sensor is mainly composed of a sensor grate, a fiber breathable membrane (5), a glass fiber water-absorbing membrane (7), a high-efficiency water-absorbing agent (8), a sensor housing (1) and a sensor packaging cover (6). One side of the working electrode (9) on the sensor grate is in communication with the sample gas, and the auxiliary electrode (2) and reference electrode (10) are on the other side of the sensor grate and are in communication with the atmosphere. The acid-treated glass fiber water-absorbing membrane (7), the high-efficiency water-absorbing agent (8) are adjacent to the auxiliary electrode (2) and the reference electrode (10).

[0008] The sensor castor uses a perfluorosulfonic acid cation exchange membrane (3) to replace the traditional flowing electrolyte solution, uses a waterproof catalyst membrane bonded by precious metal powder with polytetrafluoroethylene as an electrode, working electrode (9), auxiliary The e...

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Abstract

The invention relates to a method, which adopts solid polymer electrode instead of traditional liquid electrolyte solution and uses SPE gas electrode as CO2 sensitive electrode.The method comprises following steps: SPE-CO2 electrode absorbing gas phase CO2; conducting CO2 oxidization desorption; controlling some conditions to make CO2 oxidization desorption rate and CO2 density in the sample gas in linear relationship; then directly detecting CO2 density in the sample gas.

Description

Technical field: [0001] Electronic Information Industry--Sensing Technology Background technique: [0002] At present, domestic and foreign 2 Gas is usually analyzed by gas chromatography and detected by infrared. These methods usually have large equipment, can only be used in laboratories, and have high precision but are expensive. Currently available as a portable CO 2 Gas detection instruments only have thermal conductivity, optical methods (optical interference principle) and semiconductor sensitive components. Semiconductor sensors are not mature enough due to their low selectivity; thermal conductivity and optical methods detect CO 2 Gas, currently using chemicals to filter CO 2 The main defects of the instruments made by these two traditional methods are complicated operation, low detection accuracy, and it is difficult to meet the requirements of users. CO filtration by chemical method 2 , not only the medicine needs to be replaced frequently, but also the fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/407
Inventor 严河清
Owner GUANGZHOU SENSCN INSTR
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