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Sensitive membrane, screen-printed electrode containing sensitive membrane and application thereof

A technology of screen printing electrodes and sensitive membranes, which is applied in the field of electrodes, can solve problems such as unsatisfactory sensitivity, low sensitivity, and poor reproducibility, and achieve the effects of improving response sensitivity, good selectivity, and rapid measurement

Inactive Publication Date: 2015-04-08
WUHAN ZHONGZHIBODA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many electrodes used in the determination of trace elements, aminophylline and other substances, but most of them are columnar glassy carbon electrodes, which are expensive and need to be re-modified after repeated use, facing technical problems such as poor reproducibility and low sensitivity.
[0011] In order to improve the sensitivity and selectivity of the electrode, the multi-walled carbon nanotube composite, colloidal gold and nafion are mainly modified on the surface of the electrode. After the above modifications, the sensitivity of the prepared electrode in the determination of trace elements, aminophylline and other substances Still not ideal and has poor stability

Method used

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  • Sensitive membrane, screen-printed electrode containing sensitive membrane and application thereof
  • Sensitive membrane, screen-printed electrode containing sensitive membrane and application thereof
  • Sensitive membrane, screen-printed electrode containing sensitive membrane and application thereof

Examples

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Effect test

Embodiment 1

[0060] A kind of sensitive film, this sensitive film is coated on the working electrode surface, and described sensitive film is made up of the composition of following weight part:

[0061] Carbon nanotubes 0.05

[0062] Nano Zinc Oxide 5

[0063] Graphene 9.5.

Embodiment 2

[0065] A kind of sensitive film, this sensitive film is coated on the carbon electrode surface, and this sensitive film is made up of the composition of following parts by weight:

[0066] Multi-Walled Carbon Nanotubes 7

[0067] Nano Zinc Oxide 10

[0068] Graphene 5

[0069] Carbon electrodes were printed from carbon paste containing 5% colloidal gold particles and 5% nafion.

Embodiment 3

[0071] A kind of sensitive film, this sensitive film is coated on the carbon electrode surface, and described sensitive film is made up of the composition of following parts by weight:

[0072] Carbon nanotubes 0.15

[0073] Nano Zinc Oxide 2.35

[0074] Graphene 3

[0075] The preparation method of this sensitive film is:

[0076] a. mixing carbon nanotubes and nano zinc oxide evenly to prepare carbon nanotube composites;

[0077] b. Dissolving the carbon nanotube composite in 0.03% CTAB aqueous solution to prepare a composite suspension, coating the composite suspension on the surface of the working electrode, and evaporating the solvent at a low temperature to obtain a base layer sensitive film;

[0078] c. Dissolving the graphene in a 0.03% aqueous solution to prepare a graphene suspension, coating the graphene suspension on the surface of the base sensitive film, and evaporating the solvent at a low temperature to obtain a sensitive film.

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Abstract

The invention provides a sensitive membrane and a screen-printed electrode containing the sensitive membrane. The screen-printed electrode comprises an electrode substrate, wherein a working electrode, a reference electrode and an auxiliary electrode are printed on the electrode substrate, and the surface of the working electrode is coated with a layer of sensitive membrane; and the sensitive membrane is sequentially composed of a carbon nano tube, nano-zinc oxide and graphene. The screen-printed electrode can be used for determining microelements, vitamins, amino acids, aminophylline, digoxin, uric acid or monoamine transmitters and the like, and has the characteristics of high sensitivity, good selectivity, low cost, rapidness in determination, easiness in operation, and the like.

Description

technical field [0001] The invention relates to an electrode, in particular to a screen printing electrode containing a sensitive film and its application. Background technique [0002] Trace elements (such as Zn, Fe, Ca, Mg, Cu, Mn, Pb, etc.) are closely related to human health and life activities. They participate in the metabolic process in the human body. Studies have shown that the lack of certain essential trace elements can lead to disease For example, iron deficiency can cause iron deficiency anemia, and zinc deficiency and copper deficiency can lead to decreased immunity. [0003] Vitamins (such as vitamin A, vitamin B, vitamin C, vitamin E, etc.) are trace organic substances necessary for the normal physiological functions of humans and animals, and are also important components of prosthetic groups or coenzymes. play a huge role. Reports show that vitamin deficiency can cause physiological dysfunction and cause certain diseases, such as vitamin A deficiency is p...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/333
CPCG01N33/49G01N27/327
Inventor 杜思达
Owner WUHAN ZHONGZHIBODA TECH CO LTD
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