Method for utilizing molecularly imprinted electrochemical sensor to detect trace gibberellin A3
A technology of molecular imprinting and gibberellin, applied in the direction of electrochemical variables of materials, etc., can solve the problems such as the lack of relevant research on the detection of trace gibberellins, and achieve the effect of easy automation of detection, and improved sensitivity and selectivity.
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[0023] (1) Treatment of gold electrodes:
[0024] The gold electrodes were surface-polished with 1.0 μm, 0.3 μm and 0.05 μm alumina powder in turn, and then soaked and washed in 50% nitric acid and absolute ethanol for 5 min respectively, and were taken out and placed in pure water. Ultrasonic washing for 5 min, and then in 0.5 mol / L H 2 SO 4 The cyclic voltammetry (CV) electrochemical treatment was performed at -0.2-1.0 V until a stable cyclic voltammetry (CV) curve was obtained.
[0025] (2) Preparation of gibberellin A3 molecularly imprinted electrochemical sensor (prepared by electropolymerization of o-phenylenediamine):
[0026] Place the clean gold electrode treated in step (1) in a solution containing 1.5×10 -3 mol / L o-phenylenediamine and 5×10 -4 In a mixed solution of mol / L gibberellin A3, scan 30 cycles with cyclic voltammetry at a scan rate of 50 mV / s between 0 V and 0.8 V; take out the gold electrode and rinse it with double distilled water, then let it dry ...
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