Method for simultaneously detecting two mycotoxins through magnetic control electrochemical adapter sensor
An aptamer sensor and mycotoxin technology, applied in the field of electrochemical detection, can solve the problems of single detection, low sensitivity and long detection time, etc.
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[0039] Example 1
[0040] (1) Preparation of MB-aptamer1 and MB-aptamer2 capture probes:
[0041] Prepare Fe according to existing methods 3 O 4 Microspheres, specifically as follows: 0.5536gFeCl 3 ·6H 2 O was dissolved in a mixture of 10mL of ethylene glycol (EG) and 10mL of diethylene glycol (DEG), then 1.5g of sodium acetate and 1.0g of polyethylene glycol were added, stirred at room temperature for 30min, and transferred to the hydrothermal reactor React at 200°C for 2.5h, then cool to room temperature. The mixture is magnetically separated and washed with water and ethanol several times to obtain Fe 3 O 4 Microspheres, put in an oven, volatilize the solvent at 50℃ to obtain dry Fe 3 O 4 Microspheres, spare.
[0042] Prepare Fe coated with gold nanoparticles according to the existing method 3 O 4 Microspheres (MB), specifically as follows: 0.14g of Fe prepared above 3 O 4 The microspheres were dissolved in 40 mL of ethanol, and 400 μL of 3-aminopropyltriethoxysilane (APTS) stock...
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