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Method for determining nitrobenzyl phenol three isomer simultaneouslly

A technology of isomers and nitrophenols, which is applied in the field of simultaneous determination of three isomers of nitrophenols, can solve the problems of high price, inconvenient portability, and difficulty in realizing separate determinations, etc., and achieve high determination sensitivity , Improve the effect of signal response

Inactive Publication Date: 2007-09-05
SHANGHAI UNIV
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Problems solved by technology

The above methods for the determination of several nitrophenol isomers are not portable and expensive, and are not suitable for real-time and on-line determination in environmental water monitoring
[0003] Using electrochemical methods, the properties of the three isomers of nitrophenol are similar, and both the oxidation peak potential and the reduction peak potential are very close, so it is difficult to achieve separate determination

Method used

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  • Method for determining nitrobenzyl phenol three isomer simultaneouslly
  • Method for determining nitrobenzyl phenol three isomer simultaneouslly

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Embodiment 1

[0023] 1. First, prepare a hydroxylated multi-walled carbon nanotube modified electrode: coat a carboxylated carbon nanotube modifier on an ordinary glassy carbon electrode substrate; the preparation method of the modifier: 1 mg of carboxylated multi-walled carbon nanotube Wall carbon nanotubes were added to 10ml of N,N-dimethylformamide, ultrasonically treated for half an hour to make them uniformly dispersed, and a 1mg / 10ml black mixed solution was obtained, which was the modifier; 10ul of the above-mentioned uniformly dispersed The modifier was drip-coated on the surface of the cleaned glassy carbon electrode substrate, then dried with an infrared lamp for 1 hour, and then rinsed with distilled water to obtain the carboxylated carbon nanotube modified electrode required for the test; the diameter of the carbon nanotube was 20 ~40nm.

[0024] 2. Make a standard curve for the determination of nitrophenol isomers:

[0025] (1) In the electrolytic cell, the carboxylated carbon...

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Abstract

A method for simultaneously determining three isomers of nitro-phenol includes coating the dressing agent on vitreous carbon electrode first and obtaining dressed electrode by infrared lamp-drying, carrying out circulation VA scanning on dressed electrode in three isomers mixed solution of nitro-phenol to obtain VA curve of primary differential linear scanning and relation curve diagram of each nitro-phenol concentration to peak current then substituting measured values in standard curve equation to calculate out concentration of each nitro-phenol.

Description

technical field [0001] The invention relates to a method for simultaneously measuring three isomers of nitrophenol by using a carboxylated multi-walled carbon nanotube modified electrode, belonging to the technical field of isomer analysis and determination of organic chemistry. Background technique [0002] Phenolic compounds are the second largest category of environmental pollutants, which are common substances in industrial wastewater, and nitrophenols are more toxic, among which dinitrophenol is designated as a priority pollutant by the US Environmental Protection Council, so it is very important for their separation Detection has become one of the important subjects of environmental analysis research. At present, the main methods for the separation and determination of nitrophenol isomers are: flow injection analysis, combination of spectrophotometry and chemometric methods, liquid chromatography, ion chromatography and capillary electrophoresis. The above methods for...

Claims

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Application Information

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IPC IPC(8): G01N27/48G01N27/30
Inventor 丁亚平邹雪莲罗立强李丽于美丽吴庆生
Owner SHANGHAI UNIV
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