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Production method for Modified electrode for detecting grape-sugar concentration in non-enzyme condition

A glucose concentration and modified electrode technology, which is applied in the field of public health, can solve the problems of high price and low measurement accuracy of glucose oxidase, and achieve the effects of high active conductivity, good adhesion, and increased specific surface area

Inactive Publication Date: 2011-09-28
SICHUAN UNIV
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Problems solved by technology

[0005] In view of the existing glucose sensor adopting the method of enzymatic discoloration, and the price of glucose oxidase is relatively expensive, and it is easily affected by environmental factors such as temperature and pH, and the measurement accuracy is not high. The purpose of the present invention is to use carbon nanometer Composite modification of tube and nickel ferricyanate to prepare a modified electrode capable of detecting glucose concentration under enzyme-free conditions

Method used

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Embodiment

[0023] 1. with pipe diameter 30-50 nanometer, purity>95%, the multi-walled carbon nanotube that length is 15 microns is incubated 1 hour at 600 ℃ in high temperature furnace. Then in mixed acid (concentrated H 2 SO 4 : Concentrated HNO 3 =2:1) ​​to obtain functionalized multi-walled carbon nanotubes after ultrasonic stirring.

[0024] 2. Dissolve the purified carbon nanotubes in N, N-dimethylformamide (DMF) solution and ultrasonically disperse them, then get 20 microliters of the dispersion and apply them to the surface of the glassy carbon electrode, and dry naturally to obtain Carbon nanotube modified electrodes.

[0025] 3. Using a three-electrode system, the glassy carbon electrode modified by carbon nanotubes is used as the working electrode, the platinum electrode is used as the counter electrode, and the Ag / AgCl electrode is used as the reference electrode, and nickel ferricyanide is electrochemically deposited by cyclic voltammetry The carbon nanotubes modify the su...

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Abstract

The invention relates to a preparation method of a modified electrode for detecting dextrose concentration in absence of enzyme, and application thereof. Firstly, a carbon nano-tube is modified on the surface of a glassy carbon electrode; and then a cyclic voltammetry is used for carrying out electrochemical deposition of nickel hexacyanoferrate on the electrode surface modified by the carbon nano-tube, thereby obtaining the modified electrode modified compositely by the carbon nano-tube and nickel hexacyanoferrate. The modified electrode has good response to dextrose solution in absence of enzyme, the detection lower limit of the dextrose concentration is 1.6*10<-6>mol / L; when the dextrose concentration ranges from 3.32*10<- 6>M / L to 4.95*10<- 3>M mol / L, the obtained response current has a good linear relation with the dextrose concentration, and the prepared electrode has excellent anti-interference ability.

Description

1. Technical field [0001] The invention relates to a preparation method of an electrode, in particular to a preparation method and application of a modified electrode for detecting glucose concentration without enzymes, and belongs to the field of public health. 2. Technical Background [0002] Diabetes is a worldwide frequently-occurring and common disease. With the improvement of people's living standards and the increase of the elderly population, its incidence is on the rise. There are more than 200 million patients in the world. It has become a global health care problem and seriously threatens human health. It has become the third most dangerous disease after cardiovascular disease and cancer. There are about 50 million patients in our country today. Therefore, the diagnosis and treatment of diabetes is a major issue not only in our country but also in the medical circles all over the world. [0003] In order to meet the requirements of automatic, rapid and accurate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/327G01N33/50G01N27/416
Inventor 张云王晓燕
Owner SICHUAN UNIV
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