Electrochemical sensor for detecting pH value of purified water online

An electrochemical and sensor technology, applied in the application field of online detection of pH value of purified water, can solve the problems of unstable value, short electrode life, slow response, etc., and achieve stable measurement value, rapid response, and long electrode life Effect

Inactive Publication Date: 2014-12-24
东兴市鸿生实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art online monitoring of the pH value of purified water, there are defect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] Under ice-water bath conditions, 15 parts (weight parts) of poly-3-ethylenedioxythiophene are added to 500 parts of chloroform, ultrasonically shaken for 60 minutes at an ultrasonic frequency of 15 Hz to form a uniform and stable solution, and then 15 parts of sulfurous acid are added For the catechol ester, heat the resulting mixture in a muffle furnace to 100°C for 12 hours. After the reaction is complete, cool to room temperature naturally. After the precipitate has precipitated, it is filtered, washed with ethanol and deionized water 4 times, and then Vacuum drying at room temperature for 15 hours to form the sensor sensitive layer substrate.

[0027] The surface of the gallium arsenide electrode is polished to make the substrate surface of the gallium arsenide blank electrode flat and smooth, and then the blank gallium arsenide electrode is ultrasonically oscillated in ethanol and deionized water at a frequency of 15 Hz, and the above-prepared sensiti...

Example Embodiment

[0029] Example 2

[0030] Under ice-water bath conditions, 30 parts (weight parts) of poly-3-octylthiophene was added to 900 parts of chloroform, ultrasonically oscillated for 100 minutes at an ultrasonic frequency of 30 Hz to form a uniform and stable solution, and then 30 parts of catechol , Heat the resulting mixture in a muffle furnace to 120°C for 10 hours. After the reaction is complete, cool to room temperature naturally. After the precipitate precipitates, filter, wash with ethanol and deionized water 4 times, and then vacuum dry at room temperature. After 30 hours, the substrate of the sensor sensitive layer is formed.

[0031] The surface of the gallium arsenide electrode is polished to make the substrate surface of the gallium arsenide blank electrode flat and smooth, and then the blank gallium arsenide electrode is ultrasonically oscillated in ethanol and deionized water at a frequency of 10 Hz. The layer substrate was dispersed in deionized water to prepare a suspensi...

Example Embodiment

[0033] Example 3

[0034] Under ice-water bath conditions, add 17 parts (weight parts) of poly-3-octylthiophene to 680 parts of chloroform, oscillate ultrasonically for 70 minutes at an ultrasonic frequency of 18 Hz to form a uniform and stable solution, and then add 17 parts of sulfite o-benzene Diphenol ester, heat the resulting mixture in a muffle furnace to 115°C and react for 13 hours. After the reaction is complete, cool to room temperature naturally. After the precipitate precipitates, it is filtered, washed with ethanol and deionized water for 6 times, and then at room temperature. Dry under vacuum for 19 hours to form the sensor sensitive layer substrate.

[0035] The surface of the gallium arsenide electrode is polished to make the substrate surface of the gallium arsenide blank electrode flat and smooth, and then the blank gallium arsenide electrode is ultrasonically oscillated in ethanol and deionized water at a frequency of 15 Hz, and the above-prepared sensitive The ...

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Abstract

The invention relates to an electrochemical sensor for detecting pH value of purified water online. Gallium arsenide is adopted as a working electrode, and the electrode is manufactured through a poly-3-octyl-thiophene and pyrocatechin derivative in a modification mode. When the electromechanical sensor is used for detecting the pH value of purified water online, the minute quantity of hydrogen ions in the purified water can be responded quickly, and the measured pH value is accurate and stable. Meanwhile, the electrode is long in service life, so that the sensor has application prospects in water purifying devices in the field of biological medicine.

Description

technical field [0001] The invention relates to an electrochemical sensor, in particular to an electrochemical sensor based on a gallium arsenide electrode and its application in the online detection of the pH value of purified water. Background technique [0002] Purified water refers to drinking water obtained by distillation, ion exchange, reverse osmosis or other suitable methods to remove ions, impurities, heavy metals and bacteria. It is mostly used in the field of biomedical production and is closely related to human health. Therefore, it is particularly important to control the quality of purified water, among which, the monitoring result of the pH value of purified water is a very critical parameter. [0003] For the preparation process of purified water, since the water quality may change at any time, it is necessary to install an online pH monitoring device. In the prior art, a glassy carbon electrode is used to monitor the pH value of the purified water. [0004...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/416
Inventor 孙京华潘正海
Owner 东兴市鸿生实业有限公司
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