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Method for preparing integrated multiple ultramicro microdisc electrode

A micro-disk electrode, integrated technology, applied in the direction of electrochemical variables of materials, etc., can solve the problems of inability to prepare, difficult to obtain, and complicated to operate.

Inactive Publication Date: 2008-06-18
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first method is complicated to operate, and it is difficult to adjust the spacing of carbon fibers to a smaller value (the smaller the spacing between two carbon fiber electrodes, the more scientific and reasonable the data of on-site synchronous detection); the second method is simple and easy to implement, but the θ glass tube It is a foreign product, and for domestic researchers, it is not easy to obtain and the price is relatively expensive; in addition, this method cannot prepare multi-femacrodisk electrodes with more than 2 electrodes

Method used

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  • Method for preparing integrated multiple ultramicro microdisc electrode
  • Method for preparing integrated multiple ultramicro microdisc electrode
  • Method for preparing integrated multiple ultramicro microdisc electrode

Examples

Experimental program
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Embodiment 1

[0019] Preparation of double ultrafine carbon fiber / platinum microdisk electrodes

[0020] 1. Clean the carbon fiber (CF) with a diameter of 7 μm and a length of about 1.5 cm and the platinum (Pt) wire with a diameter of 20 μm and a length of about 1.5 cm with acetone, absolute ethanol, and ultrapure water for 3 to 5 minutes, and then remove it Rinse with ultrapure water; put the cleaned electrode filaments in a drying oven at 50°C for 10 hours, and set aside.

[0021] 2. Connect the carbon fiber with the enamelled copper wire whose front end has been depainted with silver glue to obtain a carbon fiber electrode.

[0022] 3. Immerse the front end of the carbon fiber electrode in an acetone solution with a mass ratio of 0.5% polyvinylidene fluoride, take it out, and air-dry it in the air, so that the carbon fiber at the front end of the electrode, the connection between the carbon fiber and the enamelled copper wire, and the enamelled copper wire A layer of insulating polyviny...

Embodiment 2

[0028] Preparation of Six Ultramicro Platinum Disk Electrodes

[0029] 1. Get 6 platinum wires with a diameter of 100 μm and a length of about 2 cm, and clean them according to step 1 of Example 1.

[0030] 2. Use silver glue to connect 6 platinum wires to 6 enamelled copper wires whose front ends have been depainted to obtain 6 platinum electrodes.

[0031] 3. Immerse the front ends of the six platinum electrodes respectively in the ethanol solution of 5% Nafion by mass ratio, take them out, and air-dry them in the air, so that the platinum wires at the front ends of the six platinum electrodes, the joints between the platinum wires and the enamelled copper wires, and The depainted part of the enamelled wire is covered with an insulating Nafion film.

[0032] 4. Use liquid epoxy resin to bond 6 platinum microwires coated with Nafion film in parallel; at the same time, use 5% polyvinylidene fluoride solution to bond 6 enamelled copper wires in parallel, and the epoxy resin is...

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Abstract

This invention relates to a method for preparing integrated multiple ultramicro microdisc electrodes. Parallel sticking a plurality of electrode microwires connected to electric wires and insulated by the insulating material to obtain the integrated microelectrode cluster; putting the cluster into a glass tube, sealing with epoxy resin, polishing two end faces, and obtaining the target. Compared with prior art, This invention has no limit to the microdisk electrode number, needs no auxiliary instrument, and has wide application in chemical field.

Description

technical field [0001] The invention relates to a preparation method of an integrated multi-ultramicro disk electrode. Background technique [0002] Since multiple ultramicroelectrodes can simultaneously detect and analyze substances with different electrochemical activities, they are widely used in the fields of electroanalytical chemistry and life sciences. For example, the combination of dual ultramicroelectrodes and liquid chromatography can improve the selectivity of the liquid chromatography / electrochemical system, thereby achieving the purpose of analyzing and detecting electroactive species in complex biological samples (Roston, D.A.; Kissinger, P.T. Analytical Chemistry (1981), 53(11), 1695-1699.); Double ultramicroelectrodes combined with capillary electrophoresis can improve the sensitivity and selectivity of capillary electrophoresis / electrochemical systems, which is very effective for the study of electroactive biological systems (Zhong , M.; Zhou, J.; Lunte, S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
Inventor 刘军杨毅夫邵惠霞
Owner WUHAN UNIV
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