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Method for concurrent measurement of dopamine and ascorbic acid using glassy carbon electrode

A glassy carbon electrode and ascorbic acid technology, applied in the field of electrochemical analysis and detection, can solve the problems of inconvenient portability, complicated operation, no measurement, etc., and achieve good stability and reproducibility, high catalytic performance, and mild modification conditions.

Inactive Publication Date: 2009-11-25
SHANGHAI UNIV
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Problems solved by technology

The above methods for the determination of ascorbic acid and dopamine are not portable, expensive, and complicated to operate
According to the literature we consulted, we found that although there are more and more reports on modified electrodes at this stage, and there are many methods for measuring ascorbic acid and dopamine on modified electrodes, the electrodes we modified with nanomaterials have high stability and reproducibility. Good modified electrode, there is no literature report on the determination of dopamine and ascorbic acid using the semiconducting nanomaterial zinc sulfide modified glassy carbon electrode

Method used

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  • Method for concurrent measurement of dopamine and ascorbic acid using glassy carbon electrode
  • Method for concurrent measurement of dopamine and ascorbic acid using glassy carbon electrode

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Embodiment 1

[0019] The process and steps of the assay method in the present embodiment are as follows:

[0020] (1) Firstly, the glassy carbon electrode is placed in the 0.05μm Al 2 o 3 Polish to the mirror surface on the polishing flannelette, and then ultrasonic cleaning pretreatment in distilled water, dilute nitric acid solution, absolute ethanol and double distilled water;

[0021] (2) Preparation of semiconductor nano-material zinc sulfide modified glassy carbon electrode: drip the alcohol dispersion of semiconductor nano-zinc sulfide on the pretreated glassy carbon electrode; the preparation method of this modifier is: first weigh 50mg nanometer zinc sulfide Place in 10ml of pure alcohol solution, ultrasonically until the nano zinc sulfide is evenly dispersed in alcohol to obtain the desired modifier;

[0022] (3) Drop a certain amount of the above uniformly dispersed modifier on the surface of the cleaned glassy carbon electrode substrate, and dry it at room temperature, then pu...

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Abstract

The invention relates to a method for modifying glassy carbon electrode using semi-conductor nano material zinc sulphide and measuring dopamine ascorbic acid at the same time, which belongs to the field of electrochemical analysis and detection technique. The invention principally uses semi-conductor nano material zinc sulphide alcohol fluid dispersion to drop on the glassy carbon electrode, thereby modifying the glassy carbon electrode and improving stability of surface of glassy carbon electrode. The method provided by the invention uses nano zinc sulphide to modify glassy carbon electrode, which is used as a novel electrochemical sensor, and is good for rapid electrochemical determination of dopamine and ascorbic acid at the same time.

Description

technical field [0001] The invention relates to a method for simultaneously measuring dopamine and ascorbic acid by using a semiconductor nanometer material zinc sulfide to modify a glassy carbon electrode, and belongs to the technical field of electrochemical analysis and detection. Background technique [0002] Semiconductor nanoparticles refer to particles of semiconductor non-metallic oxides, transition metal oxides, and compounds of transition metals and V-VII main groups with a particle size between 1 and 100 nm. Conductive nanomaterials have optical nonlinearity and luminescent properties different from bulk materials, and their physical length is equivalent to the free path of electrons. The carrier transport process will show significant quantum mechanical characteristics, mainly small size effects, surface and Interface effect, quantum size effect and macroscopic tunnel effect, etc., the above effects make nano-semiconductor devices have unique and excellent optica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/30
Inventor 丁亚平俞大旺李丽罗立强张芬芬吴庆生
Owner SHANGHAI UNIV
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