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Chemically modified electrode for sensitive detection of sulfaguanidine and preparation method and application thereof

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, unsuitable popularization and application, expensive instruments and equipment, etc., and achieves the effects of good accuracy, strong practicability and low cost

Active Publication Date: 2019-09-06
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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  • Chemically modified electrode for sensitive detection of sulfaguanidine and preparation method and application thereof
  • Chemically modified electrode for sensitive detection of sulfaguanidine and preparation method and application thereof
  • Chemically modified electrode for sensitive detection of sulfaguanidine and preparation method and application thereof

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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 sulfaguanidine and a preparation method and application thereof. The chemically modified electrode is a high-electroactivity AgPt@MXene nanocomposite modified glassy carbon electrode, and relates to the field of electroanalytical chemistry and electrochemical sensors. The AgPt@MXene heterojunction nanocomposite hasa large specific surface area and high catalytic activity, and is capable of enhancing the enrichment amount of the sulfaguanidine in the detection mediums, improving the sensitivity of the measurement, effectively accelerating the electron transfer and improving the electrochemical response signal. The prepared chemically modified electrode is good in selectivity, simple, low in cost and good instability, is suitable for on-site detection, and is successfully applied to the accurate detection of the sulfaguanidine in animal-derived foods.

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 Applications(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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