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Identification detection method for nitro-aromatic explosives

A technology for nitroaromatics and explosives, which is applied in the field of detection of nitroaromatics explosives, can solve the problems of sensor array development and creation difficulties, sensor array preparation difficulties, etc., and achieve good response and high detection sensitivity.

Active Publication Date: 2013-01-16
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the current research status is concerned, the stability and recognition degree of the sensor array unit used have great limitations. Moreover, the introduction of multiple sensor units also brings certain difficulties to the preparation of the sensor array. And due to the use of multiple sensing units in the sensor array, the sensing film array has different excitation and emission wavelengths, and there are multiple detection wavelengths in the detection, which brings great challenges to the development and creation of the sensor array. difficulty
Therefore, it is still a challenge to quickly, simply and sensitively identify and detect nitroaromatic explosives.

Method used

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  • Identification detection method for nitro-aromatic explosives
  • Identification detection method for nitro-aromatic explosives
  • Identification detection method for nitro-aromatic explosives

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Taking the detection of nitroaromatic explosives contained in explosives as an example, the specific identification method includes the following steps:

[0027] (1) The 5-dimethylamino-1-naphthalenesulfonyl-modified fluorescent The films are arranged into film Ⅰ~film Ⅵ, respectively immerse film Ⅰ~film Ⅵ into a cuvette filled with 2.5mL double distilled water, place them in a single-photon counting time-resolved fluorescence spectrometer, and obtain the emission spectrum of film Ⅰ ~The spectral curve of thin film Ⅵ, and get its corresponding 6×1 emission spectrum peaks.

[0028] (2) Set the concentration to 2.5×10 -2mol / L nitrophenylethanol solution was used as the nitrobenzene standard solution, and was added to the six cuvettes in step (1), with an initial addition amount of 10 μL, and the six cuvettes were placed in single-photon counting time-resolved fluorescence Excite their respective emission spectra in the spectrometer, and obtain 6 corresponding emission sp...

Embodiment 2

[0038] Taking the detection of nitroaromatic explosives contained in explosives as an example, the specific identification method includes the following steps:

[0039] Step (1) is the same as in Example 1.

[0040] (2) Set the concentration to 2.5×10 -2 mol / L nitrophenylethanol solution was used as the nitrobenzene standard solution, and added to the six cuvettes in step (1), the initial addition amount was 15 μL, and the six cuvettes were placed in the single-photon counting time-resolved fluorescence Excite their respective emission spectra in the spectrometer, and get 6 corresponding emission spectrum peaks, then add nitrobenzene standard solution to the six cuvettes 9 times, each addition is 5 μL, in each cuvette The concentration of nitrobenzene in the medium increases with the number of additions to form an equidifferent concentration gradient of 5 μL. After each addition of nitrobenzene standard solution, each cuvette is placed in a single-photon counting time-resolve...

Embodiment 3

[0049] In the identification method of nitroaromatic explosives in the above-mentioned embodiments 1-2, in step (2), the concentration is 2.5×10 -2 The mol / L nitrophenylethanol solution was used as the nitrobenzene standard solution, and added to the six cuvettes in step (1), the initial addition amount was 3 μL, and the six cuvettes were placed in the single-photon counting time-resolved fluorescence Excite their respective emission spectra in the spectrometer, and obtain 6 corresponding emission spectrum peaks, then add 14 times of nitrobenzene standard solutions to the six cuvettes, and the concentration of nitrobenzene in each cuvette varies with As the number of additions increases, an arithmetic series of concentration gradients is formed. Other operations in this step are the same as those in the corresponding embodiments, and a total of 6×15 emission spectrum peaks are read. In step (3) the concentration was 2.5 × 10 -2 The ethanol solution of 2,4-dinitrotoluene, the ...

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Abstract

The invention relates to an identification detection method for nitro-aromatic explosives. Sensing thin films of the same fluorescent unit connected through different connecting arms have different quenching responses to nitro-aromatic compounds, and six fluorescent sensing thin films modified by 5-dimethyl amino-1-naphthalene sulfonyl taking different diamines as connecting arms are used for further analyzing quenching response results by using a weighted principal component analysis method to learn about that four standard nitro-aromatic explosives 4,6-trinitrotoluene, 2,4,6-trinitrophenol, 2,4-dinitrotoluene and nitrobenzene are in different areas in coordinates to further fulfill the aim of identifying the four nitro-aromatic explosives in an explosive and make the identification detection of the four nitro-aromatic explosives in the explosive possible. According to the identification detection method, the nitro-aromatic compounds can be well responded and sensitively detected.

Description

technical field [0001] The invention belongs to the technical field of detection of nitroaromatic explosives, in particular to a method capable of identifying nitroaromatic explosives in explosives. Background technique [0002] In recent years, with the increasing demand for terrorist threats, the application of chemical and biological weapons in warfare, non-metal mine detection, and environmental quality monitoring, countries around the world have paid more and more attention to the research of various high-performance thin-film sensors. At present, the trace detection techniques for p-nitroaromatic explosives are mainly various spectroscopic methods and chemical sensing methods. Spectroscopy mainly includes chromatography, mass spectrometry, Raman spectroscopy, and ion mobility; chemical sensing mainly includes electrochemical sensing, mass sensing, and fluorescence sensing. Compared with other methods, the fluorescent thin film sensor has the advantages of high sensiti...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 房喻刘科何刚刘太宏崔红赵珂如
Owner SHAANXI NORMAL UNIV
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