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A disposable screen-printed electrochemical sensor for trace amounts of carbendazim

A carbendazim screen and electrochemical technology, which is applied in the field of throwable trace carbendazim screen printing electrochemical sensor and its preparation, can solve the problem of prone to coagulation, affect the sensitivity of graphene oxide sensor, reduce the To solve problems such as detection accuracy and detection sensitivity of detection substances, to achieve the effect of improving sensitivity, good thermal stability and chemical characteristics, and improving detection accuracy

Active Publication Date: 2018-06-05
ZUNYI NORMAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a strong π-π bond between graphene sheets, which affects its dispersion in solution, that is, it is prone to coagulation in solution, which affects the sensitivity of graphene oxide as an electrode sensor. Then reduce the detection accuracy and detection sensitivity of the detection substances, especially for the detection of toxic substances such as carbendazim, which requires higher sensitivity, and then under the premise of improving the detection accuracy, it is necessary to oxidize the above-mentioned The electrode of the sensor prepared by graphene is modified to improve the accuracy of electrochemical detection of carbendazim

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A disposable trace carbendazim screen-printed electrochemical sensor consists of a screen-printed electrode, a graphene oxide dispersion layer coated on the screen-printed electrode, and a graphene oxide dispersion layer coated on the Composition of the imidazole ionic liquid dispersion layer, wherein the concentration of the graphene oxide dispersion is 2 mg / ml, and the amount of the graphene oxide dispersion is 2 μL.

[0026] The preparation method of the throwable trace carbendazim screen printing electrochemical sensor comprises the following steps:

[0027] (1) Ultrasonic disperse graphene oxide in distilled water to prepare a graphene oxide dispersion with a concentration of 2mg / ml, take 2 μL and apply it on the surface of the screen-printed electrode, then place it in an infrared lamp to dry to obtain Graphene oxide modified electrode;

[0028] (2) Use imidazole ionic liquids to ultrasonically disperse in distilled water, prepare imidazole ionic liquid dispersio...

Embodiment 2

[0031] A disposable trace carbendazim screen-printed electrochemical sensor consists of a screen-printed electrode, a graphene oxide dispersion layer coated on the screen-printed electrode, and a graphene oxide dispersion layer coated on the Composition of the imidazole ionic liquid dispersion layer, wherein the concentration of the graphene oxide dispersion is 10 mg / ml, and the amount of the graphene oxide dispersion is 5 μL.

[0032] The preparation method of the graphene oxide modified electrode comprises the following steps:

[0033] (1) Ultrasonic disperse graphene oxide in distilled water to prepare a graphene oxide dispersion with a concentration of 10 mg / ml, take 5 μL and apply it on the surface of the screen-printed electrode, and then place it in an infrared lamp to dry to obtain Graphene oxide modified electrode;

[0034] (2) Use imidazole ionic liquids to ultrasonically disperse in distilled water, prepare imidazole ionic liquid dispersions with a concentration of...

Embodiment 3

[0037] A disposable trace carbendazim screen-printed electrochemical sensor consists of a screen-printed electrode, a graphene oxide dispersion layer coated on the screen-printed electrode, and a graphene oxide dispersion layer coated on the Composition of the imidazole ionic liquid dispersion layer, wherein the concentration of the graphene oxide dispersion is 5 mg / ml, and the amount of the graphene oxide dispersion is 3 μL.

[0038] The preparation method of the imidazole ionic liquid / graphene oxide modified electrode comprises the following steps:

[0039] (1) Ultrasonic disperse graphene oxide in distilled water to prepare a graphene oxide dispersion with a concentration of 5 mg / ml, take 3 μL and apply it on the surface of the screen-printed electrode, and then place it in an infrared lamp to dry to obtain Graphene oxide modified electrode;

[0040] (2) Use imidazole ionic liquids to ultrasonically disperse in distilled water, prepare imidazole ionic liquid dispersions wi...

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Abstract

The invention relates to the technical field of electrochemical sensors, in particular to a disposable trace carbendazim screen-printed electrochemical sensor. The graphene oxide electrode is modified by an ionic liquid, thereby making the disposable trace carbendazim The screen-printed electrochemical sensor electrode has better sensitivity, thereby improving the accuracy of the substance to be detected, especially the sensitivity of the sensor to carbendazim, thereby improving the detection accuracy of carbendazim.

Description

technical field [0001] The invention relates to the technical field of electrochemical sensors, in particular to a throwable trace carbendazim screen-printed electrochemical sensor and a preparation method and application thereof. Background technique [0002] Carbendazim, also known as N-2-phenylpropazolyl carbamate methyl ester, abbreviated as BCM, its molecular formula is C 9 h 9 N 3 o 2 . BCM is a broad-spectrum, high-efficiency, low-toxicity, systemic fungicide with systemic therapeutic and protective effects. It has a control effect on many kinds of crop diseases caused by fungi, and is widely used in the treatment of crops and other diseases. Because of its relatively long residual effect period, it is toxic to mammals and humans, and it will also cause pollution and harm to the environment. , therefore, the detection of carbendazim is crucial. There are many methods for detecting carbendazim, among which the common ones are: enzyme-linked immunoassay, ultraviol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48
Inventor 伍远辉罗宿星杜启露刘小叶
Owner ZUNYI NORMAL COLLEGE
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