Method for electrochemical detection of antibiotics in milk based on vertical and ordered micelle enrichment
A vertically ordered micelles and vertically ordered technology, applied in the field of electrochemical sensing, can solve the problems of low detection accuracy and easy to be affected by external adjustments, achieve high sensitivity, wide detection linear range, and expand application space Effect
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Embodiment 1
[0035] The electrochemical process of chloramphenicol in milk was detected using vertically ordered CTAB micelles modified ITO electrode:
[0036] (1) With 0.1mol / L, the sodium chloride aqueous solution that pH value is 6 will dilute the milk that direct supermarket buys 10 times, as the solution to be tested, as figure 1 shown. Argon gas was passed through the solution to be tested to eliminate the interference of oxygen in the solution. Using a simple three-electrode system, such as Figure 7 As shown, vertical ordered CTAB modified ITO electrode, platinum electrode and silver / silver chloride electrode were used as working electrode, counter electrode and reference electrode, respectively.
[0037] (2) chloramphenicol is dissolved in dehydrated alcohol and is configured into stock solution, and the chloramphenicol stock solution of adding different volumes obtains a series of solutions to be tested (the concentration of chloramphenicol is respectively 0.4ppm, 0.7ppm in the...
Embodiment 2
[0048] The electrochemical process of nitrofurantoin in milk was detected using vertically ordered CTAB micelles modified ITO electrode:
[0049] (1) Dilute the milk purchased directly from the supermarket by 5 times with a 0.1mol / L phosphate buffer solution with a pH value of 7, and use it as the solution to be tested. Nitrogen gas is passed through the solution to be tested to eliminate the interference of oxygen in the solution. A simple three-electrode system was adopted, and the vertically ordered CTAB-modified FTO electrode, platinum electrode, and silver / silver chloride electrode were used as the working electrode, counter electrode, and reference electrode, respectively.
[0050] (2) Dissolve nitrofurantoin in absolute ethanol to prepare a stock solution, add different volumes of nitrofurantoin stock solution to the test solution to obtain a series of test solutions, and perform differential pulse voltammetry after enrichment at -0.4V potential for 30s test.
[0051]...
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