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Method for regenerating carbon fiber ultramicroelectrode

An ultra-fine electrode and carbon regeneration technology, applied in the field of bioelectrochemical analysis, can solve the problems of changing electrode microstructure and surface chemistry, and deterioration of electrode response reproducibility and stability, etc., and achieve stable electrochemical performance. Good electrochemical response, simple and convenient activation method

Inactive Publication Date: 2017-12-26
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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Problems solved by technology

[0006] Physical methods include mechanical grinding and polishing to remove surface-adhered pollutants from the surface of bulk electrodes. This technique is not suitable for implementation on the surface of ultra-micro electrodes.
In addition, there are traditional methods such as laser ablation, flame etching, and pickling. Zhang Liyao et al. reported the regeneration of carbon fiber electrodes by flame etching (a new method for regeneration of carbon fiber electrodes, Journal of Analysis and Testing, vol.18: 457-459, 2002 ), the various performances of the regenerated electrode by this method are equivalent to those of the original electrode. The inconvenient application is that the harsh treatment conditions can easily change the microstructure and surface chemistry of the electrode, resulting in poor reproducibility and stability of the electrode response.

Method used

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  • Method for regenerating carbon fiber ultramicroelectrode
  • Method for regenerating carbon fiber ultramicroelectrode
  • Method for regenerating carbon fiber ultramicroelectrode

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Experimental program
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Embodiment 1

[0029] 1.1 Instruments and reagents

[0030] XD-RFL Laboratory Inverted Microscope (Ningbo Sunny Instrument Co., Ltd.); pHS-3C pH Meter (Shanghai Instrument Scientific Instrument Co., Ltd.); CHI660D Chemical Workstation (Shanghai Chenhua Instrument Company); KQ-400KDE High Power CNC Ultrasonic cleaner; this experiment uses a two-electrode system: a carbon fiber ultra-micro electrode is the working electrode, and an Ag / AgCl electrode is the reference electrode.

[0031] Carbon fiber (6 μm in diameter, Jilin Shenzhou Carbon Fiber Co., Ltd.), absolute ethanol (analytical grade, Tianjin Pharmaceutical Company), dopamine (DA, Sigma), norepinephrine (NE, Sigma), ascorbic acid (AA, analytical grade, Sinopharm Chemical Reagent Co., Ltd.), DA was made into 1.0×10 with absolute ethanol as solvent -2 The mother liquor of mol / L is standby. Five serotonin (5-HT, Sigma), with 0.1mol / L HClO 4 Configured as 1.0×10 -3 mol / L mother solution, stored in a refrigerator at 4°C, and diluted with...

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Abstract

The invention discloses a method for regenerating carbon fiber ultramicroelectrode. The method is characterized in that a reference electrode and a poisoning electrode are placed in deionized water, through a constant potential current time method, the reference electrode and the poisoning electrode are activated, wherein no chemical substance is added in the deionized water. The above method has good activation effect, compared with the poisoning electrode, the electrochemistry response of the processed carbon fiber ultramicroelectrode is obviously increased, and the electrochemistry performance of the regenerated electrode is stable.

Description

technical field [0001] The invention relates to the technical field of bioelectrochemical analysis, in particular to a method for regenerating carbon fiber ultramicro electrodes. Background technique [0002] Ultramicroelectrodes have excellent characteristics such as high temporal and spatial resolution and high sensitivity. In recent years, they have been extensively and deeply studied in many fields, and have become an important branch of electrochemical research with great development prospects. Because of its ability to detect rapid and small chemical changes in specific micro-regions in biological systems, ultra-microelectrode electrochemical detection is widely used to explore cytochemistry in biological microenvironments, and is especially suitable for in vivo analysis. However, in the bioelectrochemical analysis system, the surface of the ultramicroelectrode is easily polluted and passivated by free radicals or electropolymerization products generated in the electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/327G01N27/416
CPCG01N27/3275G01N27/416
Inventor 程寒李元王婷婷谷飞黄蓉萍鲍昌昊马静芳黄先菊
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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