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Electrochemical sensor for detecting triclosan, preparation method and application thereof

A triclosan and electrochemical technology, applied in the field of electrochemical detection, can solve the problems of catalytic performance, detection limit and detection range, etc., and achieve excellent electrocatalytic activity, low cost, and good stability

Active Publication Date: 2017-11-07
湖南角山米业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these electrodes have problems such as catalytic performance, detection limit or detection range.

Method used

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  • Electrochemical sensor for detecting triclosan, preparation method and application thereof
  • Electrochemical sensor for detecting triclosan, preparation method and application thereof
  • Electrochemical sensor for detecting triclosan, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Preparation of a chemically modified electrode for detecting triclosan

[0040] (1) Add 20mg of nitrogen-doped graphene to 20mL of water, and disperse evenly by ultrasonication for 15min;

[0041] (2) Add 0.1mL 0.1mol / L CuCl to the above dispersion 2 After stirring evenly, add 0.0878g of sodium lauryl sulfate and fully dissolve it in a water bath at 35°C under the action of magnetic stirring;

[0042] (3) Then add 0.18mL of 1.0mol / L NaOH solution, then add 0.5mL of 0.1mol / L glucose, heat to a slight boil at 5mim under magnetic stirring, cool to room temperature, and then centrifuge, wash twice with water and then centrifuge Get Cu 2 O / NRGO;

[0043] (4) Dissolve the prepared Cu with 5mL water 2 O / NRGO is ultrasonically dispersed in a beaker;

[0044] (5) Weigh 5mg PbCl 2 , dissolved in 2 mL of water and added dropwise to Cu 2 Stir evenly in the O / NRGO dispersion;

[0045] (6) Another 0.5 g of ascorbic acid was taken, dissolved in 2 mL of water, and add...

Embodiment 2

[0048] Example 2 An electrochemical sensor for the quantitative detection of triclosan

[0049] The Pd-Cu prepared by embodiment 1 2 The O / NRGO modified electrode was used as the working electrode, the Ag-AgCl was used as the reference electrode, and the platinum electrode was used as the auxiliary electrode to assemble a three-electrode test system, and connected to the electrochemical workstation to obtain an electrochemical sensor for the quantitative detection of triclosan.

Embodiment 3

[0050] Example 3 Electrical Performance Test of Chemically Modified Electrodes and Electrochemical Sensors Used for Triclosan Quantitative Detection

[0051] (1) Comparison of electron transfer performance of different electrodes

[0052] In the three-electrode test system prepared as in Example 2, the glassy carbon electrode (a), Cu 2 O-NRGO modified electrode (b) and Pd-Cu according to the present invention 2 O / NRGO modified electrode (c) at 5×10 -3 mol / L K 3 [Fe(CN) 6 ] Mixed with 0.10mol / L KCl bottom solution for cyclic voltammetry test, the test conditions are: potential range -0.2~0.6V, scanning speed 0.05V / s, the test results are as follows Figure 4 . From Figure 4 Visible K 3 [Fe(CN) 6 ] at the glassy carbon electrode (a), Cu 2 O-NRGO modified electrode (b) and Pd-Cu according to the present invention 2 The oxidation peak currents on the O / NRGO modified electrode (c) were 2.2 μA, 14.5 μA and 47.6 μA, respectively. 2 The O / NRGO modified electrode has the la...

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Abstract

The invention relates to the technical field of electrochemical detection and particularly discloses an electrochemical sensor for detecting triclosan, a preparation method and an application thereof. The electrochemical sensor adopts a chemically-modified electrode for detecting the triclosan as a working electrode, Ag-AgCl as a reference electrode and a platinum electrode as an auxiliary electrode to form a three-electrode system; and the three-electrode system is assembled, and then is connected with an electrochemical working station to form the electrochemical sensor. The chemically-modified electrode for quantitatively detecting the triclosan and the electrochemical sensor have excellent electrocatalytic activity for the triclosan as well as extremely-low detection limit, good stability, interference resistance and reproducibility.

Description

technical field [0001] The invention relates to the technical field of electrochemical detection, in particular to an electrochemical sensor for detecting triclosan, a preparation method and application thereof. Background technique [0002] Triclosan is a white or off-white powder crystal with strong antibacterial and antifungal effects, and has been widely used in the production of many light industrial products such as soap, cosmetics, toothpaste, washing liquid and disinfectant. Due to the widespread use of triclosan, it will flow into the sewer system along with industrial wastewater and domestic sewage, and then flow into rivers, lakes, and oceans; it is difficult to be degraded by microorganisms, and it can also attach to other organisms and suspend in water, causing Further accumulation of triclosan in organisms will endanger the safety of aquatic systems. There are also studies that show that about 75% of trichloride exists in sludge, which is extremely harmful to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/36G01N27/48
CPCG01N27/308G01N27/36G01N27/48
Inventor 李俊华刘梦琴许志锋张复兴贺娇罗谅晖贺灵芝
Owner 湖南角山米业有限责任公司
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