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A chemically modified electrode for sensitive detection of sulfamidine and its preparation method and application

A chemical modification and sensitive detection technology, applied in the field of electrochemical sensors and analytical chemistry, can solve the problems of complex sample pretreatment, expensive instruments and equipment, unsuitable for popularization and application, etc., and achieves the effects of good accuracy, low cost and strong practicability

Active Publication Date: 2021-01-26
XINYANG NORMAL UNIVERSITY
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Problems solved by technology

[0003] In recent years, many analytical methods have been used to detect sulfamidine, such as ELISA, gas chromatography-mass spectrometry, liquid chromatography-mass spectrometry and high-performance liquid chromatography, etc., but the above methods require complex sample preparation. processing, expensive equipment and cumbersome operations, it is not suitable for popularization and application, and when determining the content of sulfamidine in complex samples, there will be more interfering substances

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  • A chemically modified electrode for sensitive detection of sulfamidine and its preparation method and application
  • A chemically modified electrode for sensitive detection of sulfamidine and its preparation method and application
  • A chemically modified electrode for sensitive detection of sulfamidine and its preparation method and application

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing, the present invention will be further described:

[0035] The modified electrode is a glassy carbon electrode modified by AgPt@MXene nanocomposite, and its preparation method is as follows:

[0036] Step 1. Preparation of AgPt@MXene nanocomposite:

[0037] After preheating 5 mL of ethylene glycol at 140 °C for 1 h, add 0.2 mL of 3 mmol / L HCl in ethylene glycol solution under vigorous stirring; continue stirring and heating for 10 min, dropwise at a rate of 45 mL / h Add 3 mL 94 mmol / L AgNO 3 ethylene glycol solution and 3 mL 147 mmol / L PVP ethylene glycol solution, then stirred and heated for 12 h to obtain a beige suspension, cooled to room temperature; 5 mL 0.1 wt% PVP aqueous solution was added to a 25 mL round bottom flask and 1 mL of the above beige suspension, heated to 100 °C and stirred for 10 min; then, 2 mL of 1 mmol / L H 2 PtCl 6 Solution, under the condition of 100 ° C, continue to stir for 1 h, and make AgPt na...

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Abstract

The invention discloses a chemically modified electrode for sensitive detection of sulfamidine and its preparation method and application. The chemically modified electrode is a glassy carbon electrode modified by AgPt@MXene nanocomposites with high electroactivity, and relates to electroanalytical chemistry and electroanalysis. In the field of chemical sensors: the AgPt@MXene heterojunction nanocomposite material disclosed by the present invention has a large specific surface area and catalytic activity, can enhance the enrichment of sulfamidine in the detection medium, improve the sensitivity of the measurement, and can effectively accelerate electron transfer. Improve the electrochemical response signal; the chemically modified electrode prepared by the invention has good selectivity, is simple, cheap, and has good stability, is suitable for on-site detection, and has been successfully applied to the accurate detection of sulfamidine in animal source food.

Description

technical field [0001] The invention relates to the fields of electrochemical sensors and analytical chemistry, in particular to a chemically modified electrode for sensitive detection of sulfamidine, a preparation method and application thereof. Background technique [0002] Sulfamidine is the earliest sulfonamide antibacterial drug used in intestinal infection. Due to its broad antibacterial ability, it can effectively prevent and treat bacillary dysentery, malaria, enteritis and postoperative intestinal infection. At present, sulfamidine often appears in animal source food and poultry feed, and sulfamidine residues also exist in our daily food, such as chicken, pork, mutton, rabbit meat and milk. Excessive sulfaguanidine residues in the human body can cause adverse reactions such as poisoning, and taking a large amount of sulfaguanidine can also damage normal immune function and may even cause cancer. Therefore, the monitoring of sulfamidine is an urgent task, and it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 孙俊永甘甜徐力萍杨玉凤刘彦明
Owner XINYANG NORMAL UNIVERSITY
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