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Method for detecting trace Cu<2+> in margarya melanoides by using three-dimensional carbon fiber modified electrode as sensor

A technology for modifying electrodes and carbon fibers, which is used in measuring devices, electrochemical variables of materials, instruments, etc.

Inactive Publication Date: 2019-12-31
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no use of electrostatic silk imitation to prepare 3D carbon fiber modified electrodes as sensors for the detection of trace Cu in snails. 2+ Related literature reports on detection

Method used

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  • Method for detecting trace Cu&lt;2+&gt; in margarya melanoides by using three-dimensional carbon fiber modified electrode as sensor
  • Method for detecting trace Cu&lt;2+&gt; in margarya melanoides by using three-dimensional carbon fiber modified electrode as sensor
  • Method for detecting trace Cu&lt;2+&gt; in margarya melanoides by using three-dimensional carbon fiber modified electrode as sensor

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Embodiment 1

[0029] Embodiment 1: A kind of using three-dimensional carbon fiber modified electrode as a sensor to detect trace amounts of Cu in snails 2+ method, including the following steps:

[0030] A. Synthesis of 3D-CNF (three-dimensional carbon nanofiber):

[0031]A-1. Weigh 1.6g polyacrylonitrile (PAN) and polyacrylonitrile mass 15% montmorillonite (MMT) and dissolve it in 10mL N,N-dimethylformamide, stir magnetically at room temperature for 12h to obtain PAN / MMT mixed solution.

[0032] A-2. Fill the prepared precursor solution PAN / MMT mixed solution into a syringe, perform spinning at a high pressure of 15kV, and vacuum dry for 12 hours after spinning. The PAN / MMT composite nanofibers were carbonized by heating to 800 °C at a rate of 2 °C / min in a nitrogen atmosphere, and cooled naturally to room temperature. The composite nanofibers were soaked in 10% HF for 12 hours, then rinsed with deionized water until neutral, and dried at 80°C to obtain three-dimensional carbon nanofib...

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Abstract

The invention relates to a method for detecting trace Cu<2+> in margarya melanoides by using a three-dimensional carbon fiber modified electrode as a sensor. A three-dimensional carbon nanofiber modified electrode is used as a novel electrochemical sensor and is used for detecting Cu<2+>. The three-dimensional carbon nanofibers are obtained by spinning a mixed solution of montmorillonite (MMT) andpolyacrylonitrile (PAN) through electrostatic spinning, performing carbonizing at high temperature and performing HF etching. Because the material can increase active sites on the surface of the electrode and increase the transmission rate of metal ions, good signal response is shown for Cu<2+> detection under an optimal test condition, and the modified electrode has high stability and selectivity. Cu<2+> is detected by differential pulse voltammetry, the oxidation peak current and the concentration of Cu<2+> have a good linear relationship in the ranges of 2-10 [mu]g.L<-1> and 10-130 [mu]g.L<-1>, and the detection limit is 0.4 [mu]g.L<-1>. A good recovery rate is achieved when the modified electrode is used for actual sample detection, which indicates that the material has potential application value.

Description

technical field [0001] The invention relates to a trace amount of Cu in snails 2+ The detection method, especially relates to a kind of using three-dimensional carbon fiber modified electrode as a sensor to detect trace amounts of Cu 2+ Methods. Background technique [0002] Snail powder is a special snack in Liuzhou, Guangxi. It is made of local soft, tough and refreshing rice noodles, with special ingredients, and blended with rich and moderate hot and sour snail broth. Snails are one of the main raw materials of snail powder, but as aquatic organisms, snails can enrich different heavy metals, so it is of great significance to analyze the content of heavy metals in snails. [0003] Copper is an essential trace element for human growth and development, but excessive intake of copper will cause certain damage to the human body. When the copper content in the body is too high, it is easy to cause harm to the human liver and gallbladder. When there is a problem with this or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/308G01N27/48
Inventor 程昊周正元
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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