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
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[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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