Electrochemical sensor for online detection of pH value of purified water
An electrochemical and sensor technology, which is used in the field of online detection of the pH value of purified water, can solve the problems of numerical instability, short electrode life, slow response, etc., and achieve stable measurement values, rapid response, and long electrode life. Effect
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Embodiment 1
[0026] Under the condition of an ice-water bath, 15 parts (by weight) of poly-3-ethylenedioxythiophene was added to 500 parts of chloroform, ultrasonically oscillated for 60 minutes, and the ultrasonic frequency was 15 Hz to form a uniform and stable solution, and then 15 parts of sulfurous acid was added Catechol ester, the obtained mixture was heated to 100°C in a muffle furnace to react for 12 hours. After the reaction was completed, it was naturally cooled to room temperature. After the precipitate was precipitated, filtered, washed with ethanol and deionized water for 4 times, and then Vacuum dry at room temperature for 15 hours to form a sensor sensitive layer substrate.
[0027] The surface of the gallium arsenide electrode was polished to make the base surface of the gallium arsenide blank electrode smooth, and then the blank gallium arsenide electrode was ultrasonically oscillated at a frequency of 15 Hz in ethanol and deionized water in sequence, and the above-prepare...
Embodiment 2
[0030] Under the condition of an ice-water bath, 30 parts (by weight) of poly-3-octylthiophene were added to 900 parts of chloroform, ultrasonically oscillated for 100 min, and the ultrasonic frequency was 30 Hz to form a uniform and stable solution, and then 30 parts of catechol , heat the obtained mixture in a muffle furnace to 120°C for 10 hours, after the reaction is completed, cool it down to room temperature naturally, wait for the precipitate to precipitate, filter it, wash it with ethanol and deionized water 4 times, and then dry it in vacuum at room temperature After 30 hours, the sensor sensitive layer substrate was formed.
[0031] The surface of the gallium arsenide electrode was polished to make the base surface of the gallium arsenide blank electrode smooth, and then the blank gallium arsenide electrode was ultrasonically oscillated at a frequency of 10 Hz in ethanol and deionized water in sequence, and the above-prepared sensitive The layer substrate was dispers...
Embodiment 3
[0034] Under the condition of an ice-water bath, 17 parts (parts by weight) of poly-3-octylthiophene were added to 680 parts of chloroform, ultrasonically oscillated for 70 minutes, and the ultrasonic frequency was 18 Hz to form a uniform and stable solution, and then 17 parts of o-phenylene sulfite were added. Diphenol ester, heat the obtained mixture in a muffle furnace to 115°C for 13 hours, after the reaction is completed, cool it down to room temperature naturally, wait for the precipitate to precipitate, filter, wash with ethanol and deionized water for 6 times, and then Dry under vacuum for 19 hours to form a sensor sensitive layer substrate.
[0035] The surface of the gallium arsenide electrode was polished to make the base surface of the gallium arsenide blank electrode smooth, and then the blank gallium arsenide electrode was ultrasonically oscillated at a frequency of 15 Hz in ethanol and deionized water in sequence, and the above-prepared sensitive The layer subst...
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