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High-sensitivity chemically modified electrode for detecting thiabendazole and preparation method of chemically modified electrode

A sensitive detection and chemical modification technology, applied in the field of nano-electrochemical sensors, can solve the problems of difficult miniaturization, complex processing, expensive instruments, etc., and achieve good stability and small size

Active Publication Date: 2017-12-01
JIANGSU NOON CROP SCI CO LTD
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  • Abstract
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Problems solved by technology

Commonly used measurement methods include GC, HPLC, GC-MS, LC-MS, SFC, etc., but the above methods are relatively cumbersome to operate, expensive instruments are not easy to miniaturize, and sample pretreatment is complicated

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  • High-sensitivity chemically modified electrode for detecting thiabendazole and preparation method of chemically modified electrode
  • High-sensitivity chemically modified electrode for detecting thiabendazole and preparation method of chemically modified electrode
  • High-sensitivity chemically modified electrode for detecting thiabendazole and preparation method of chemically modified electrode

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing, the present invention will be further described:

[0027] The modified electrode is CuO@SiO 2 @Ag nanocomposite modified ionic liquid carbon paste electrode, its preparation method is as follows:

[0028] Step 1. CuO@SiO 2 Preparation of @Ag nanocomposites:

[0029] First, synthesize hollow copper oxide nanospheres: under magnetic stirring, dissolve 0.199g of copper acetate in 10mL of distilled water, add 2mL of ammonia water (25wt%), and add 10mL of 2mg / mL sodium alginate solution dropwise, stir for 10min, and the mixture Transfer to a 50mL reaction kettle, seal it, react at 160°C for 6h, cool to room temperature, centrifuge, wash with ethanol and water three times, filter with suction, and dry at room temperature;

[0030] Second, the synthesis of hollow CuO@SiO 2 . At room temperature, 0.4 g of hollow copper oxide nanospheres were dispersed in a mixed solution (containing 75 mL of ethanol, 10 mL of water, 3.8 mL of...

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Abstract

The invention relates to the field of nano electrochemical sensors and particularly discloses a high-sensitivity chemically modified electrode for detecting thiabendazole and a preparation method of the chemically modified electrode. The modified electrode is an ionic liquid carbon paste electrode modified with a CuO@SiO2@Ag nano-composite. The modified electrode has high measurement sensitivity and good selectivity for thiabendazole and is convenient, cheap, good in stability and suitable for on-site detection. The modified electrode is the ionic liquid carbon paste electrode modified with the CuO@SiO2@Ag with high electrochemical activity. The prepared chemically modified electrode is successfully applied to accurate detection of thiabendazole in samples.

Description

technical field [0001] The invention relates to the field of nano electrochemical sensors, in particular to a chemically modified electrode for highly sensitive detection of thiabendazole and a preparation method thereof. Background technique [0002] The extensive use of pesticides in agricultural production has led to more and more severe pesticide residue problems, seriously endangering human health. Thiabendazole is a high-efficiency, low-toxic and broad-spectrum fungicide. It is mainly used for the prevention and control of crop diseases, and can also be used for antiseptic preservation of fruits and vegetables. Excessive intake has carcinogenic, teratogenic and mutagenic effects. Class has a certain toxic effect. Commonly used measurement methods include GC, HPLC, GC-MS, LC-MS, SFC, etc., but the above methods are relatively cumbersome to operate, expensive instruments are not easy to miniaturize, and sample pretreatment is complicated. The electrochemical analysis m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333G01N27/30G01N27/48
CPCG01N27/308G01N27/333G01N27/48
Inventor 孙俊永甘甜王志凯李洁彬刘彦明
Owner JIANGSU NOON CROP SCI CO LTD
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