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Modified electrode for detecting hydroquinone and catechol

A technology of catechol and hydroquinone, which is applied in the field of electrochemical detection and can solve the problems of distinguishing detection and difficulty between the two and the like

Inactive Publication Date: 2014-01-29
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing technology is difficult to distinguish and detect the two when hydroquinone and catechol exist at the same time, and to provide a method for detecting hydroquinone and catechol without mutual interference. modified electrode

Method used

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  • Modified electrode for detecting hydroquinone and catechol
  • Modified electrode for detecting hydroquinone and catechol
  • Modified electrode for detecting hydroquinone and catechol

Examples

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Embodiment 1

[0026] (1) L-tryptophan functionalized graphene

[0027] Dissolve 100 mg of L-tryptophan in 5 mL of formic acid, sonicate in a water bath until completely dissolved, add 5 mg of graphene (purchased from Nanjing Xianfeng Nano Material Technology Co., Ltd. Ultrasonic 4h. The mixture was centrifuged at 10,000rpm for 20 minutes at high speed to separate and remove the supernatant, and the rest was mixed with water and ultrasonicated for 10 minutes, centrifuged to remove the supernatant and washed repeatedly for 3-4 times, and finally made L-color with a concentration of 0.2mg / ml Amino acid functionalized graphene dispersion.

[0028] figure 2 Raman spectra of graphene and L-tryptophan functionalized graphene. I D / I G It is generally considered to be proportional to the defects on graphitic carbon. From the figure, it can be concluded that the I of graphene and L-tryptophan functionalized graphene D / I G are 0.97 and 1.15, respectively, which shows that the surface area of...

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Abstract

The invention belongs to the field of electrochemical detection and discloses a modified electrode for detecting hydroquinone and catechol. The modified electrode comprises a substrate electrode as well as graphene treated by L-tryptophan and attached on the substrate electrode. The modified electrode disclosed by the invention can be used for respectively detecting the hydroquinone and the catechol in a quantitative manner without a mutual interference problem, wherein a detecting linear range of the catechol is 5*10<-6>mol / L-3*10<-4>mol / L, and detecting limit is 1.45*10<-7>mol / L; and the detecting linear range of the hydroquinone is 5*10<-6>mol / L-5*10<-4>mol / L, and the detecting limit is 1.69*10<-7>mol / L.

Description

technical field [0001] The invention belongs to the field of electrochemical detection, in particular to a modified electrode for detecting hydroquinone and catechol. Background technique [0002] Hydroquinone is an important chemical raw material. It is widely used in cosmetics, leather, pesticides, seasonings, pharmaceuticals and synthetic dyes in daily production and life. Hydroquinone and catechol are two kinds of quinone. Isomers, as highly toxic environmental pollutants, usually exist in environmental samples, which are very harmful to human body and environment. Hydroquinone can cause fatigue, headaches, and kidney damage, and catechol can cause decreased liver function. Some methods have previously been reported to accurately detect these two isomers of hydroquinone, but hydroquinone and catechol have similar structures and properties, making simultaneous detection difficult. It has been recently reported that the methods for simultaneously detecting these two subs...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/48
Inventor 蒋欢张东霞何志芳连茜雯周喜斌卢小泉
Owner NORTHWEST NORMAL UNIVERSITY
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