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Ultra trace aromatic nitro compound electrochemical detection method

A technology of aromatic nitro compounds, applied in the field of detection of aromatic nitro compounds, can solve problems such as low vapor pressure, limited effective early warning mechanism for explosive source detection, and difficulty in identifying the molecular types of explosive substances, etc., to achieve convenient operation, Improved detection sensitivity and fast response

Inactive Publication Date: 2011-08-03
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these technologies involve complex and expensive instruments and equipment, and it is difficult to identify the types of explosive substance molecules, thus limiting the establishment of effective early warning mechanisms and the detection of explosive sources
Another problem in the detection of explosive substances is its low vapor pressure, TNT is 7ppb

Method used

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  • Ultra trace aromatic nitro compound electrochemical detection method
  • Ultra trace aromatic nitro compound electrochemical detection method
  • Ultra trace aromatic nitro compound electrochemical detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Fullerene C 60 Preparation of nanomaterial modified electrodes:

[0059] The solid working electrode glassy carbon electrode should be cleaned before use, first use α-Al 2 o 3 Polish and sonicate with distilled water. Then put it in an oven at about 45°C to dry the surface of the electrode.

[0060] Fullerene C 60 Dissolve in toluene solvent, take an appropriate amount of the solution and drop it on the surface of the above-mentioned electrode. After the toluene solvent evaporates naturally at room temperature, C is evenly generated on the surface of the glassy carbon electrode. 60 nanomaterials, such as figure 1 shown.

[0061] (2) Utilize fullerene C 60 Nanomaterials modify the working electrode to detect the electrochemical process of ultra-trace aromatic nitro compounds in the electrolyte solution:

[0062] (1) adopt simple three-electrode electrochemical system, and comprise working electrode (C 60 Working electrode modified by nanomaterials), counter ...

Embodiment 2

[0068] (1) Fullerene C 70 Preparation of nanomaterial modified electrodes:

[0069] The solid working electrode graphite electrode should be cleaned before use, first use α-Al 2 o 3 Polish and sonicate with distilled water. Then put it in an oven at about 45°C to dry the surface of the electrode.

[0070] Fullerene C 70 Dissolve in the carbon disulfide solvent, take an appropriate amount of the solution and drop it on the surface of the above electrode. After the carbon disulfide solvent evaporates naturally at room temperature, C 70 nanomaterials.

[0071] (2) Utilize fullerene C 70 Nanomaterials modify the working electrode to detect the electrochemical process of ultra-trace aromatic nitro compounds in the electrolyte solution:

[0072] (1) adopt simple three-electrode electrochemical system, and comprise working electrode (C 70 Glassy carbon electrode modified by nanomaterials), counter electrode (gold wire) and reference electrode (saturated calomel electrode). Fir...

Embodiment 3

[0078] (1) Fullerene Gd@C 82 Preparation of nanomaterial modified electrodes:

[0079] The solid working electrode glassy carbon electrode should be cleaned before use, first use α-Al 2 o 3 Polish and sonicate with distilled water. Then put it in an oven at about 45°C to dry the surface of the electrode.

[0080] Good Gd@C will be synthesized at room temperature 82 Disperse the nanomaterials in the cyclohexane solvent, take an appropriate amount of the solution and drop it on the surface of the above electrode, let the cyclohexane evaporate naturally at room temperature, and evenly form Gd@C on the surface of the glassy carbon electrode. 82 nanomaterials, such as image 3 shown.

[0081] (2) Using fullerene Gd@C 82 Nanomaterials modify the working electrode to detect the electrochemical process of ultra-trace aromatic nitro compounds in the electrolyte solution:

[0082] (I) Adopt a simple three-electrode electrochemical system, and include the working electrode (Gd@C ...

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Abstract

The present invention relates to detection technique of aromatic nitro compound, especially a method for detecting ultra-trace aromatic nitro compound rapidly by electrochemistry volt-ampere method of solid working electrode decorated by sensitive material fullerene or fullerene derivative. The present invention emphasizes the discovery of electrochemistry sensitive properties of aromatic nitro compound by fullerene or fullerene derivative, and electrochemistry volt-ampere method of solid working electrode decorated by sensitive material applied to rapid detecting technique of ultra-trace aromatic nitro compound. According to the present invention, the detecting device for aromatic nitro compound is simplified, and the detecting process can be finished rapidly by sorption of aromatic nitro compound in gas or electrolyte solution by fullerene or fullerene derivative, and because of the sensitive material applied to electrochemistry volt-ampere detecting technique, the detection sensitivity is improved greatly.

Description

technical field [0001] The invention relates to the detection technology of aromatic nitro compounds, in particular to a method for rapidly detecting ultra-trace aromatic nitro compounds by electrochemical voltammetry using sensitive materials fullerene or fullerene derivatives to modify solid working electrodes . Background technique [0002] Safety issues have always been the main concern of governments around the world, and various terrorist activities are one of the most serious threats at present, especially the use of various aromatic nitro compounds, such as 2,4,6-trinitrotoluene (TNT ), 1,3,5-trinitrobenzene (TNB), 2,4-dinitrotoluene (DNT), 1,3-dinitrobenzene (DNB) and other terrorist attacks occur frequently all over the world , a serious threat to the safety of people's lives and property and social stability. With the increasing anti-terrorism awareness of governments around the world, the rapid detection of trace amounts of aromatic nitro compounds has become o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48G01N1/28G01N27/30
Inventor 万立骏张洪霞胡劲松
Owner INST OF CHEM CHINESE ACAD OF SCI