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Reagent for rapidly detecting trinitrotoluene, tetront, picric acid, dinitrotoluene and sulfur in explosives

A technology of trinitrotoluene and dinitrotoluene, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of cumbersome operation procedures, complex and frequent components, and achieve the effects of convenient popularization and application, high detection efficiency and cost saving

Pending Publication Date: 2022-05-24
XINJIANG TECHN INST OF PHYSICS & 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 techniques are sensitive and efficient, but frequent instrument calibration, lengthy and cumbersome operating procedures limit their application in field analysis
Liu Yong and others disclosed a colorimetric gel ointment for detecting explosives. The ointment is composed of hydrogel, colorimetric reagent, moisturizer, and thickener. It needs to be made under ultraviolet light curing conditions, and the conditions are harsh. The composition is complex, different colorimetric reagents need to be added to prepare corresponding ointments to detect different explosives, and one ointment cannot detect multiple explosives at the same time

Method used

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  • Reagent for rapidly detecting trinitrotoluene, tetront, picric acid, dinitrotoluene and sulfur in explosives
  • Reagent for rapidly detecting trinitrotoluene, tetront, picric acid, dinitrotoluene and sulfur in explosives
  • Reagent for rapidly detecting trinitrotoluene, tetront, picric acid, dinitrotoluene and sulfur in explosives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] a. At room temperature, the organic probe (E) 2-(3-cyano-4-(4-(dimethylamino)styryl)-5,5-dimethylfuran-2(5H)- Subunit) malononitrile 10mg was dissolved in 50mL of N,N-dimethylformamide as a solvent to prepare a probe solution with a concentration of 0.2μg / μL;

[0035] b. The probe solution obtained in step a is added to the reducing agent as sodium borohydride 100mg, and ultrasonication is carried out for 5min to obtain the rapid detection of explosives trinitrotoluene, tetrahydrol, picric acid, dinitrotoluene and sulfur free colored detection reagents.

[0036] Measure 3 mL of the detection reagent into a quartz cuvette, add 20 μL of the prepared 10 mM trinitrotoluene (TNT) standard solution, and perform UV-visible absorption spectrum scanning with a UV-Vis spectrophotometer. Trinitrotoluene (TNT) ) before and after the addition of the spectrum as shown in figure 1 As shown, by comparing the spectra before and after the reaction, it can be seen that there is an obvio...

Embodiment 2

[0038] a. At room temperature, the organic probe (E) 2-(3-cyano-4-(4-(dimethylamino)styryl)-5,5-dimethylfuran-2(5H)- Subgroup) malononitrile 5mg was dissolved in 500mL of dimethyl sulfoxide, and prepared into a probe solution with a concentration of 0.01μg / μL;

[0039] b. The probe solution obtained in step a is added to the reducing agent as potassium borohydride 30mg, ultrasonicated, and the time is 10min, to obtain the rapid detection of explosives trinitrotoluene, tetrahydrol, picric acid, dinitrotoluene and sulfur free colored reagents.

[0040] Measure 3 mL of detection reagent into a quartz cuvette, then add 20 μL of the prepared 10 mM Tetrier standard solution, and scan the UV-Vis absorption spectrum with a UV-Vis spectrophotometer. figure 2 As shown, by comparing the spectra before and after the reaction, it can be seen that there is an obvious absorption peak at 520 nm after the reaction, and the reagents before and after the reaction are directly photographed (suc...

Embodiment 3

[0042] a. At room temperature, the organic probe (E) 2-(3-cyano-4-(4-(dimethylamino)styryl)-5,5-dimethylfuran-2(5H)- Subunit) malononitrile 5mg was dissolved in 50mL of N,N-dimethylformamide as a solvent to prepare a probe solution with a concentration of 0.1μg / μL;

[0043] b, adding the probe solution obtained in step a to the reducing agent as sodium borohydride 60mg, ultrasonication, and the time is 15min, to obtain the rapid detection of explosives trinitrotoluene, tetrahydrol, picric acid, dinitrotoluene and sulfur free colored reagents.

[0044] Measure 3mL of the detection reagent into a quartz cuvette, add 20μL of the prepared 8mM picric acid standard solution, and scan the UV-Vis absorption spectrum with a UV-Vis spectrophotometer. The spectra before and after the addition of picric acid are as follows: image 3 By comparing the spectra before and after the reaction, it can be seen that two obvious absorption peaks appeared at 420 nm and 517 nm after the reaction, an...

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Abstract

The invention provides a reagent for rapidly detecting trinitrotoluene, tetront, picric acid, dinitrotoluene and sulfur in explosives. Based on a chemical colorimetric method, the reagent is prepared from an organic probe (E) 2-(3-cyano-4-(4-(dimethylamino) styryl)-5, 5-dimethyl furan-2 (5H)-subunit) malononitrile, a reducing agent sodium borohydride or potassium borohydride and a solvent. And determining whether trinitrotoluene, tetront, picric acid, dinitrotoluene and sulfur exist or not according to different changes of colors after the reaction. The reagent disclosed by the invention can be used for rapidly and qualitatively detecting trinitrotoluene, tetrone, picric acid, dinitrotoluene and sulfur in explosives and residues thereof on site. The method has the characteristics of low cost, simple reaction conditions, easiness in preparation, good reproducibility, high sensitivity and the like.

Description

technical field [0001] The invention belongs to the field of environment and standard and non-standard explosive raw material detection, and relates to a reagent for rapid detection of trinitrotoluene, tetrahydrol, picric acid, dinitrotoluene and sulfur in explosives. Background technique [0002] 2,4,6-Trinitrotoluene (TNT), dinitrotoluene (DNT), Tetra and PA are commonly used nitroaromatic explosives. Nitroaromatic explosives are bioaccumulative and highly toxic, and their chemical structures are unstable, which can adversely affect the ecological environment and public safety (carbon, 2017, 10: 314-319). Unreasonable use can lead to its release into soil, groundwater and even food, causing people to suffer from health problems such as anemia, liver damage, cataracts and cancer (Forensic Science International, 2012, 222:340-345). The saturated vapor pressure of nitroaromatic hydrocarbon explosives at room temperature is relatively low, which makes detection extremely diff...

Claims

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Application Information

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IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 窦新存周青春杨欣怡蔡珍珍李毓姝
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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