A kind of polyacrylamide conductive molecularly imprinted membrane and its preparation method and application
A technology of polyacrylamide and molecularly imprinted membrane, which is applied in the field of membrane materials and electrochemical sensors, can solve the problems of low selectivity and low conductivity, and achieve the effect of simplifying the synthesis steps and facilitating large-scale industrial production
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Embodiment 1
[0047] Preparation of Polyacrylamide Conductive Carmine Molecularly Imprinted Membrane for Quantitative Detection of Carmine Molecule
[0048] The raw materials acrylamide, N,N-methylenebisacrylamide, potassium persulfate and 0.2mol / L KNO 3 Mix according to the ratio of 780mg: 220mg: 220mg: 10mL, stir slowly and evenly to form a mixed solution A; mix the raw materials carmine, dopamine and 70% phytic acid according to the ratio of 51mg: 280mg: 10mL, stir slowly to form a mixed solution Solution B: Mix the mixed solution A and B and pre-react under ultrasonic conditions for 1 hour, cool to room temperature 25°C, then blow nitrogen gas into the solution for 10 minutes, and seal it with plastic wrap. That is, the prepared polymer solution is obtained;
[0049] The glassy carbon working electrode, saturated Ag / AgCl reference electrode and platinum wire counter electrode are inserted into the above polymerization solution together, and the three electrodes are connected by an elec...
Embodiment 2
[0058] Polyacrylamide Conductive Carmine Molecularly Imprinted Membrane for Quantitative Detection of Carmine
[0059] Specifically include the following steps:
[0060] (1) Preparation of polyacrylamide conductive carmine molecularly imprinted membrane electrode:
[0061] Same as example 1.
[0062] (2), configuration of carmine standard solution and fruit juice solution containing carmine component to be tested:
[0063] Prepare carmine standard solutions with concentrations of 2mg / L, 4mg / L, 6mg / L, 8mg / L, 10mg / L, and 12mg / L respectively, take 10mL of commercially available fruit juice solution containing carmine components, and dilute to volume with deionized water to 50mL;
[0064] (3), using polyacrylamide conductive carmine molecularly imprinted membrane electrode, using electrochemical workstation (CHI660D electrochemical workstation produced by Shanghai Chenhua Instrument Co., Ltd.) for electrochemical detection, using differential pulse voltammetry (DPV) to observe ...
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