Method for detecting tetracycline in water by using MIL-53 (Fe) modified electrode

A technology for modifying electrodes and tetracycline, which is applied in the field of environmental pollutant detection and achieves the effects of good application prospect, low cost and simple preparation

Active Publication Date: 2019-01-11
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The material and method have good application prospects, and related methods have not been reported

Method used

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  • Method for detecting tetracycline in water by using MIL-53 (Fe) modified electrode
  • Method for detecting tetracycline in water by using MIL-53 (Fe) modified electrode
  • Method for detecting tetracycline in water by using MIL-53 (Fe) modified electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Prepare MIL-53(Fe) by conventionally reported methods, such as figure 1 , is the SEM spectrum of MIL-53(Fe), showing that the prepared MIL-53(Fe) exhibits a normal cube-like morphology, such as figure 2 It is the XRD pattern of MIL-53(Fe), which shows that the prepared MIL-53(53) exhibits normal XRD characteristic peaks, indicating that MIL-53(Fe) was successfully prepared, all indicating that MIL-53(Fe) was successfully prepared. Get 10 mg of the prepared MIL-53 (Fe) material in a centrifuge tube, add 0.6 mL of 5% Nafion solution in 4.4 mL of deionized water to obtain a concentration of 2 mg / mL MIL-53 (Fe), at this time, The amount of 5% Nafion added accounted for 12% of the total volume, and then the centrifuge tube was placed in a sonicator and sonicated for 1-2 minutes to disperse the material evenly in the solution.

[0024] First, the glassy carbon electrode was polished on the suede with alumina polishing solution for 5 minutes, and ultrasonically cleaned with ...

Embodiment 2

[0028] Take 5 mg of the prepared MIL-53 (Fe) material in a centrifuge tube, add 0.6 mL of Nafion solution (5% mass concentration) and 4.4 mL of deionized water, and the prepared MIL-53 (Fe) concentration is 1 mg / L, The amount of 5% Nafion added accounted for 12% of the total volume, and the centrifuge tube was placed in a sonicator and sonicated for 1-2 minutes to disperse the material evenly in the solution.

[0029] First, the glassy carbon electrode was polished on the suede with alumina polishing solution for 5 minutes, and ultrasonically cleaned with dilute nitric acid solution and ethanol solution, respectively, until the glassy carbon surface was as smooth as a mirror. Blot the cleaned glassy carbon electrode dry with absorbent paper, add 0.004mL of the prepared dispersion solution dropwise to the surface of the glassy carbon electrode, and dry it in an oven at 60°C for 10min before use.

[0030] Using the prepared MIL-53(Fe) modified glassy carbon electrode as the work...

Embodiment 3

[0032] Get 50 mg of the prepared MIL-53 (Fe) material in a centrifuge tube, add 0.6 mL of Nafion solution with a mass concentration of 5% and 4.4 mL of deionized water, and the concentration of MIL-53 (Fe) made is 10 mg / L, 5 The amount of Nafion added accounts for 12% of the total volume, and the centrifuge tube is placed in a sonicator to sonicate for 1-2 minutes to disperse the material evenly in the solution.

[0033] First, the glassy carbon electrode was polished on the suede with alumina polishing solution for 5 minutes, and ultrasonically cleaned with dilute nitric acid solution and ethanol solution, respectively, until the glassy carbon surface was as smooth as a mirror. Blot the cleaned glassy carbon electrode dry with absorbent paper, add 0.008mL of the prepared dispersion solution dropwise to the surface of the glassy carbon electrode, and dry it in an oven at 60°C for 10min before use.

[0034] Using the prepared MIL-53(Fe) modified glassy carbon electrode as the w...

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Abstract

The invention discloses a method for detecting tetracycline in water by using MIL-53 (Fe) modified electrode. The method for detecting tetracycline in water by using the MIL-53 (Fe) modified electrodeis characterized in that the MIL-53 (Fe) is combined with a Nafion solution to form dispersion in deionized water, and then the dispersion is dropwise added to the surface of the glassy carbon electrode and is dried. The glassy carbon electrode modified by the prepared MIL-53 (Fe) is used as a working electrode, an Ag / AgCl electrode is used as a reference electrode, a platinum electrode is a counter electrode, and a 1MH2SO4 solution is used as a supporting electrolyte solution by differential pulse voltammetry (DPV), and different concentrations of tetracycline are detected by the differential pulse voltammetry (DPV) scanning. The method for detecting tetracycline in water by using the MIL-53 (Fe) modified electrode method has the advantages of simple material preparation, low cost, fastcurrent response to tetracycline, high sensitivity, low detection limit, strong anti-interference performance and strong practical performance. The material and method have good application prospects,and related methods are none reported.

Description

technical field [0001] The invention relates to a detection method with low detection limit and excellent selectivity for tetracycline in water, which belongs to the technical field of environmental pollutant detection, in particular to a method for detecting tetracycline in water with a MIL-54(Fe) modified electrode. Background technique [0002] Tetracyclines are a class of broad-spectrum antibiotics with a phenanthane nucleus, widely used in infections caused by gram-positive and negative bacteria, intracellular mycoplasma chlamydia, and rickettsiae. In addition, in some countries, including the United States and China, tetracycline is also used as a growth promoter in large quantities and fed to animals. Oral absorption of tetracycline is incomplete, and a large part is excreted into the environment as the original drug or primary metabolites. A large number of antibiotics exist in the environment, which will destroy the ecological balance, produce super-resistant bacte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/308G01N27/48
Inventor 蒋华麟牛平平陈萍华李雪芹王琦郑会涛
Owner NANCHANG HANGKONG UNIVERSITY
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