Method for detecting concentration of zinc ions

A technology of zinc ion, concentration, applied in the direction of electrochemical variables of materials, etc.

Active Publication Date: 2015-04-29
王庆超
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, there have been no reports on the use of aminated graphene-modified glassy carbon electrodes for the detection of zinc ions.

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  • Method for detecting concentration of zinc ions
  • Method for detecting concentration of zinc ions

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0027] Preparation of glassy carbon electrodes modified with aminated graphene and β-cyclodextrin on the outer surface:

[0028] S1. Grind the outer surface of the glassy carbon electrode with sandpaper with a particle size of 15 μm for 3 minutes, place the activated carbon and the polished glassy carbon electrode in ultrapure water, and ultrasonicate the water bath for 3 minutes. The temperature of the ultrasonic bath is 70 ° C, and the activated carbon The mass ratio to ultrapure water is 3:5;

[0029] S2. Place the glassy carbon electrode after ultrasonication in a water bath into chromatographically pure ethyl acetate, soak for 3 minutes, take out the glassy carbon electrode from the ethyl acetate, and remove the ethyl acetate on the surface of the glassy carbon electrode...

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Abstract

The invention discloses a method for detecting the concentration of zinc ions. The method comprises the following steps: preparing a glassy carbon electrode, of which the surface is modified with an amino-graphene and beta-cyclodextrin composite material; adding a to-be-detected solution into a buffer solution to obtain a to-be-detected mixed solution; and detecting the to-be-detected mixed solution with a three-electrode system, and obtaining the concentration of zinc ions in the to-be-detected mixed solution according to a square wave stripping voltammetry curve by reference to a zinc ion standard linear equation, wherein a working electrode in the three-electrode system is the glassy carbon electrode, of which the surface is modified with amino-graphene and beta-cyclodextrin. The method disclosed by the invention is simple, is easy to operate, has low requirements on detection conditions, greatly increases the sensitivity of zinc ions, and is up to the zinc ion detection limit of 2*10<-7> mol/L.

Description

technical field [0001] The invention relates to a method for detecting zinc ion concentration. Background technique [0002] Zinc regulates the immune function of the human body. Zinc can maintain the normal physiological functions of men, promote the normal development of children, and promote the healing of ulcers. It is often used in children with anorexia, malnutrition, and slow growth. It can also treat hair loss, rashes, oral ulcers, and gastritis. Excessive intake of zinc will cause flaccidity, thirst, chest tightness, dry cough, headache, dizziness, high fever, chills, etc. Prolonged and repeated exposure is irritating to the skin. Human life activities are inseparable from zinc, but too much or too little has a huge impact on human life activities. Therefore, the analysis and detection of zinc ions is particularly important. So far, zinc detection methods mainly include atomic absorption spectrometry, inductively coupled plasma atomic emission spectrometry, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48
Inventor 肖琦黄珊卢双燕
Owner 王庆超
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