Method for repeatedly detecting 2, 4, 6-trinitrotoluene by wiping type fluorescent test paper

A trinitrotoluene and fluorescence detection technology, which is applied in fluorescence/phosphorescence, measuring devices, and material analysis through optical means, can solve the problems of cumbersome synthesis steps and processing of fluorescence detection materials, and achieve solid phase contact detection and visualization High-level, low-cost effect

Pending Publication Date: 2022-06-07
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, these fluorescent detection materials usual...

Method used

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  • Method for repeatedly detecting 2, 4, 6-trinitrotoluene by wiping type fluorescent test paper
  • Method for repeatedly detecting 2, 4, 6-trinitrotoluene by wiping type fluorescent test paper
  • Method for repeatedly detecting 2, 4, 6-trinitrotoluene by wiping type fluorescent test paper

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Preparation of fluorescence test strips:

[0031] A. At room temperature, take 0.5mL of Cu(NO 3 ) 2 Aqueous solution and 2.5mL 50mM aqueous glutathione solution, after stirring and mixing evenly for 5min, adjust the pH 5.0 to a light yellow transparent solution with a molar concentration of NaOH of 2M, and then add anhydrous ethanol with a volume multiple of 19 times of the mixed solution of copper nitrate and glutathione to obtain a copper nanocluster solution;

[0032] b. Soak the sheared filter paper in the copper nanocluster solution obtained in step a for 1h, and obtain the deposited fluorescence test paper after natural drying, which can emit bright orange fluorescence under the illumination of 365nm ultraviolet lamp;

[0033] Paper-based fluorescence detection of 2,4,6-trinitrotoluene:

[0034] c. The fluorescence test paper prepared in step b wipes the 2,4,6-trinitrotoluene (TNT) solid powder remaining on the surface of the suspicious substance, the test paper under...

Embodiment 2

[0037] Preparation of fluorescence test strips:

[0038] A. At room temperature, take 0.5mL of Cu(NO. 30mM 3 ) 2 Aqueous solution and 2.5mL 30mM aqueous glutathione solution, stirred and mixed evenly for 1min, adjusted pH 4.0 with molar concentration of NaOH of 0.5M, and then added copper nitrate and glutathione mixed solution volume multiple 49 times of anhydrous ethanol to obtain copper nanocluster solution;

[0039]b. Soak the sheared filter paper in the copper nanocluster solution obtained in step a for 2h, and obtain the deposited fluorescence test paper after natural drying, which can emit bright orange fluorescence under the illumination of 330nm ultraviolet lamp;

[0040] Paper-based fluorescence detection of 2,4,6-trinitrotoluene:

[0041] c. The fluorescence test paper prepared in step b is wiped with the 2,4,6-trinitrotoluene (TNT) solid powder remaining on the surface of the suspicious substance, and the irradiation test paper is carried out with a portable ultraviolet...

Embodiment 3

[0044] Preparation of fluorescence test strips:

[0045] A. At room temperature, take 0.5mL of Cu(NO 3 ) 2 Aqueous solution and 2.5mL of 50mM aqueous glutathione solution, after stirring and mixing evenly for 8min, adjust pH 6.0 with a molar concentration of 1M NaOH, and then add copper nitrate and glutathione mixed solution volume multiple of 2.33 times of anhydrous ethanol to obtain copper nanocluster solution;

[0046] b. The sheared filter paper is soaked in the copper nanocluster solution obtained in step a for 4h, and the deposited fluorescence test paper is obtained after natural drying, and bright orange fluorescence can be emitted under the illumination of 340nm ultraviolet lamp;

[0047] Paper-based fluorescence detection of 2,4,6-trinitrotoluene:

[0048] c. Wipe the 2,4,6-trinitrotoluene (TNT) solid powder remaining on the surface of the trunk with the fluorescence test paper prepared in step b, scan the test strip with a fluorescence spectrometer to detect the fluores...

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Abstract

The invention provides a method for repeatedly detecting 2, 4, 6-trinitrotoluene by using wiping type fluorescent test paper, and the method is used for carrying out fluorescence detection based on the test paper of glutathione modified copper nanoclusters (GSH-CuNC). The prepared fluorescence detection test paper can recover strong orange fluorescence after being soaked in acetonitrile for 1-5 seconds after quenching during wiping detection of 2, 4, 6-trinitrotoluene (TNT), and the fluorescence recovered detection test paper can continuously wipe TNT powder residues on the solid surface to realize rapid detection of repeatable fluorescence quenching. The fluorescence detection test paper can be recycled for multiple times according to the mode, the number of cycles is at least 10 through testing, and the method provided by the invention has the characteristics of simplicity in operation, low price, high visualization degree and the like, and is beneficial to hidden TNT detection in a complex on-site environment. And an effective technical means is provided for the detection of explosive cases of criminal investigation departments of public security systems.

Description

Technical field [0001] The present invention belongs to the field of environmental and standard explosive material detection, providing a method for reproducible detection of 2,4,6-trinitrotoluene not only stab preservation, but also green non-toxic wipe-type fluorescent test strip. Background [0002] In recent years, the development of explosives detection, analysis and other research work is the premise and necessary means to effectively curb the explosion attack, the nitro explosives in the explosives are very powerful, known as the king of explosions 2,4,6-trinitrotoluene (TNT) due to its strong explosive capacity, stable nature and other characteristics, is still being used in large quantities; At the same time, 2,4,6-trinitrotoluene (TNT) can pollute the environment, have a serious toxic effect on plants, and cause irreversible harm to the human body. Therefore, the detection of 2,4,6-trinitrotoluene (TNT) is of great significance for the safety of people's lives and prope...

Claims

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/6428G01N21/6458G01N2021/6432G01N2021/6439
Inventor 窦新存代卓华王广发
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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