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A kind of preparation method and application of electrochemical sensor based on magnetic nano-nife2o4

A magnetic nanometer and electrochemical technology, applied in the field of electrochemical analysis, can solve the problem of difficult simultaneous determination of rutin and quercetin, low accuracy of rutin and quercetin plants, complex detection process of rutin and quercetin and other problems to achieve the effect of small error, low detection difficulty and high sensitivity

Active Publication Date: 2018-07-10
ZUNYI NORMAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the traditional electrochemical detection uses a conventional glassy carbon electrode, and the oxidation potentials of rutin and quercetin on the conventional glassy carbon electrode are similar, the oxidation peaks of rutin and quercetin overlap, so that the electrochemical method is more effective for rutin. Simultaneous determination of rutin and quercetin is difficult to carry out, resulting in complex detection process for rutin and quercetin, and high detection cost, which further leads to the accuracy of authenticity identification and quality identification of plants containing rutin and quercetin lower; and there is no document in the prior art to disclose the use of NiFe 2 o 4 Determination of rutin and quercetin after the dispersion liquid is modified with glassy carbon electrode

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A magnetic nano-NiFe based 2 o 4 Electrodes for electrochemical sensors, made of glassy carbon electrodes and NiFe 2 o 4 The composition of the dispersion liquid, in which the electrode structure is coated with a layer of NiFe on the surface of the glassy carbon electrode 2 o 4 Dispersion, NiFe 2 o 4 The volume of the dispersion liquid was 2 μL.

[0031] The magnetic nano-NiFe based 2 o 4 The preparation method of the electrochemical sensor electrode,

[0032] (1) FeCl 2 solution and NiCl 2 The solution was stirred and mixed evenly according to the molar ratio of 0.9:2.6 to obtain a mixed solution, then water and glycerin were added to it, and it was treated in a water bath at 70°C for 30 minutes, then the mixed emulsion was added to it, and the stirring treatment was continued for 65 minutes, and then the mixture containing Stir the boron liquid, then pass nitrogen gas at a water bath temperature of 70°C, and reflux it for 65 minutes, filter, wash, and dry t...

Embodiment 2

[0040] A magnetic nano-NiFe based 2 o 4 Electrodes for electrochemical sensors, made of glassy carbon electrodes and NiFe 2 o 4 The composition of the dispersion liquid, in which the electrode structure is coated with a layer of NiFe on the surface of the glassy carbon electrode 2 o 4 Dispersion, NiFe 2 o 4 The volume of the dispersion liquid was 5 μL.

[0041] The magnetic nano-NiFe based 2 o 4 The preparation method of the electrochemical sensor electrode,

[0042] (1) FeCl 2 solution and NiCl 2 The solution was stirred and mixed evenly according to the molar ratio of 1.1:2.4 to obtain a mixed solution, then water and glycerin were added to it, and it was treated in a water bath at 60°C for 20 minutes, then the mixed emulsion was added to it, and the stirring treatment was continued for 50 minutes, and then the mixture containing Stir the boron liquid, then pass nitrogen gas at a water bath temperature of 60°C, and reflux it for 50 minutes, filter, wash, and dry t...

Embodiment 3

[0050] A magnetic nano-NiFe based 2 o 4 Electrodes for electrochemical sensors, made of glassy carbon electrodes and NiFe 2 o 4 The composition of the dispersion liquid, in which the electrode structure is coated with a layer of NiFe on the surface of the glassy carbon electrode 2 o 4 Dispersion, NiFe 2 o 4 The volume of the dispersion liquid was 3 μL.

[0051] The magnetic nano-NiFe based 2 o 4 The preparation method of the electrochemical sensor electrode,

[0052] (1) FeCl 2 solution and NiCl 2 The solution was stirred and mixed evenly according to the molar ratio of 1:2.5 to obtain a mixed solution, then water and glycerin were added to it, and it was treated in a water bath at 65°C for 25 minutes, then the mixed emulsion was added to it, and the stirring treatment was continued for 60 minutes, and then the mixture containing Stir the boron liquid, then pass nitrogen gas at a water bath temperature of 65°C, and reflux it for 60 minutes, filter, wash, and dry to ...

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Abstract

The invention relates to the technical field of electrochemical analysis, in particular to a preparation method and application of an electrochemical sensor based on magnetic nanometer NiFe2O4. Layer NiFe2O4 dispersion liquid, the dosage of NiFe2O4 dispersion liquid is 2-5 μL, which can accurately detect rutin and quercetin at the same time, reduce the process complexity and cost of rutin and quercetin detection; It has good performance and is less affected by common metal ions and 200 times of impurities such as glucose, glycine, citric acid and arginine; and the electrode can also be applied to Simultaneous detection of rutin and quercetin, and the detection method is simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of electrochemical analysis, in particular to a preparation method and application of an electrochemical sensor based on magnetic nanometer NiFe2O4. Background technique [0002] Flavonoids rutin and quercetin are widely found in traditional Chinese medicine and plants with health care functions. They participate in the construction of capillary walls, and can reduce the permeability and fragility of blood vessels. They have anti-inflammatory, anti-oxidation, and anti-tumor properties. , anti-platelet aggregation, anti-allergic, anti-viral, anti-depressant, anti-cardiac hypertrophy, antihypertensive and neuroprotective effects. However, if certain rutin-containing tablets and softgels are not stored properly, quercetin may be present in rutin hydrolysates. As the sugar base of rutin, quercetin often coexists with rutin. It is often found to co-exist in Chinese herbal medicines, such as golden cherry, saffl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/48B82Y15/00
Inventor 伍远辉罗宿星余林刘焱李华刚
Owner ZUNYI NORMAL COLLEGE
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