A detection and evaluation method for characterizing different concentrations of bifenthrin using silver wire beam electrode
A technology of tow electrode and bifenthrin, which is applied in the high-throughput detection of pesticide residues in crops, detection and evaluation of pesticide residues in vegetables, can solve the problems of tow electrode detection of residual pesticides, etc., and achieves continuous monitoring and scanning Fast, versatile effects
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Embodiment 1
[0029] A method for detecting and evaluating bifenthrin of different concentrations by using a silver wire beam electrode, comprising the steps of:
[0030] a. Prepare the silver wire sample into a series of metal wires with a diameter not greater than 1.5mm, respectively polish the metal wires, then clean the metal wires, and then make a continuous insulating layer for the outside of each metal wire. The two end faces of metal wire are non-insulating surfaces, respectively as non-working end faces and working end faces; Polish, then use acetone and ethanol to clean the metal wire, and then use insulating varnish to impregnate the metal wire to make a continuous insulating layer for the outside of each metal wire; to achieve the compactness of the insulating layer structure, enlarge the insulating layer structure by 800 There are no holes and cracks in double observation;
[0031] b. arrange a series of metal wires prepared in the step a closely so that the distance between a...
Embodiment 2
[0036] This embodiment is basically the same as Embodiment 1, especially in that:
[0037] A method for detecting and evaluating bifenthrin of different concentrations by using a silver wire beam electrode, comprising the steps of:
[0038] a. This step is identical with embodiment one;
[0039] b. This step is the same as in Example 1
[0040] c. This step is the same as in Example 1
[0041] d. Put the tow electrode prepared in the step b into the electrolytic cell, and inject 5wt.% Na in the electrolytic cell 2 SO 4 +50ppm bifenthrin+ethanol composite solution, as the solution medium of the silver wire beam electrode test, is used to simulate the residual environment on the crops to carry out electrochemical tests, so that the working end faces of each metal wire forming the wire beam electrode are immersed in the solution medium, And carry out electrochemical test, to judge wire bundle electrode surface potential current change situation; In electrochemical test proces...
Embodiment 3
[0044] This embodiment is basically the same as the previous embodiment, and the special features are:
[0045] A method for detecting and evaluating bifenthrin of different concentrations by using a silver wire beam electrode, comprising the steps of:
[0046] a. This step is identical with embodiment one;
[0047] b. This step is identical with embodiment one;
[0048] c. This step is identical with embodiment one;
[0049] d. Put the tow electrode prepared in the step b into the electrolytic cell, and inject 5wt.% Na in the electrolytic cell 2 SO 4 +100ppm bifenthrin+ethanol composite solution, as the solution medium for the silver wire beam electrode test, is used to simulate the residual environment on the crops for electrochemical tests, so that the working end faces of the metal wires that make up the wire beam electrode are immersed in the solution medium, And carry out electrochemical test, to judge wire bundle electrode surface potential current change situation;...
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