Preparation method of electrochemical sensor for dopamine detection, product and application thereof
A sensor and electrochemical technology, applied in the field of electrochemical sensor preparation, can solve the problems of long detection period and complicated procedures, and achieve the effect of real-time detection
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Embodiment 1
[0024] A method for preparing an electrochemical sensor for dopamine detection, characterized in that the electrochemical sensor comprises: an electrode substrate, a modification layer and nanoparticles, wherein the electrode substrate is a glassy carbon electrode made of glassy carbon ; The chemical modification layer is a bromophenol blue layer; the nanoparticles are IrO 2 -Pt, follow these steps:
[0025] After the glassy carbon electrode is polished, it is ultrasonically cleaned in twice distilled water;
[0026] The cleaned glassy carbon electrode was put into the phosphate buffer solution with pH=5.0~7.0, and within the potential range of -0.2V~+2.0V, the scanning process was carried out at a scanning rate of 20mV / s for 10 cycles;
[0027] The glassy carbon electrode after cyclic scanning is placed in a phosphate buffer solution containing 0.4mmol / L bromophenol blue, the pH of the buffer solution is 7.0, and the scanning speed is 20mV / s within the potential range of 0.0...
Embodiment 2
[0032] A preparation method for an electrochemical sensor for dopamine detection, according to the following steps:
[0033] After the glassy carbon electrode is polished, it is ultrasonically cleaned in twice distilled water;
[0034] The cleaned glassy carbon electrode was placed in a phosphate buffer solution with pH=5.0, and within the potential range of -0.2V to +1.0V, cyclic scanning was performed at a scanning rate of 15mV / s for 13 cycles;
[0035] The glassy carbon electrode after cyclic scanning is put into the phosphate buffer solution containing 0.1mmol / L bromophenol blue, the pH of the buffer solution is 5.0, within the potential range of 0.0V~+1.0V, scan at 15mV / s The rate is again cyclically scanned for 10 cycles;
[0036] The glassy carbon electrode after the secondary cycle scanning treatment was taken out, washed with twice distilled water, and then placed in a phosphate buffer solution with pH = 5.0. The scan rate is 13 cycles for cyclic scan processing;
...
Embodiment 3
[0040] A preparation method for an electrochemical sensor for dopamine detection, according to the following steps:
[0041] After the glassy carbon electrode is polished, it is ultrasonically cleaned in twice distilled water;
[0042] The cleaned glassy carbon electrode was placed in a phosphate buffer solution with pH=7.0, and within the potential range of -0.2V to +2.0V, cyclic scanning was performed at a scanning rate of 20mV / s for 20 cycles;
[0043] The glassy carbon electrode after cyclic scanning is put into the phosphate buffer solution containing 1.0mmol / L bromophenol blue, the pH of the buffer solution is 7.0, within the potential range of 0.0V~+1.0V, scan at 20mV / s The rate is cyclically scanned again for 30 cycles;
[0044] The glassy carbon electrode after the secondary cycle scanning treatment was taken out, washed with double distilled water, and placed in a phosphate buffer solution with pH = 7.0. / s scan rate, cyclic scan processing 20 cycles;
[0045] Put...
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