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Method for detecting explosive peroxide TATP

A technology of explosives and peroxidation, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of TATP effective detection, heat, collision, friction sensitivity, and increase the difficulty of detection, etc., to achieve effective Detection and Sensitivity Improvement Effects

Inactive Publication Date: 2015-06-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a peroxide explosive, TATP has no metal or aromatic groups, so traditional analysis and detection methods cannot be used to effectively detect TATP in airport security checks; moreover, TATP is very sensitive to heat, impact, and friction, which makes detection more difficult

Method used

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  • Method for detecting explosive peroxide TATP
  • Method for detecting explosive peroxide TATP
  • Method for detecting explosive peroxide TATP

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] figure 1 It is a diagram of a dopant-assisted photoionization source ion mobility spectrometry device, which includes a photoionization source ion transfer tube, a dopant bottle, a thermal desorption sampler, a data acquisition system, a gas system, a heating system, etc.

Embodiment 2

[0028] figure 2 In the positive ion mode, 25ppm acetone dopant is placed in the carrier gas, and the ion mobility spectra of no sample and 200ngTATP are compared. During the experiment, the transfer tube temperature was 120°C, the injector temperature was 60°C, the carrier gas (air) and drift gas (air) flow rates were 200mL / min and 500mL / min, respectively, and the humidity was controlled below 0.1ppm. The detection results show that for the detection of TATP, the dopant is placed in the carrier gas, and the ion mobility spectrometry as a dopant-assisted photoionization source has a good detection effect. Because the use of radioactive ionization sources can be avoided, and stable reagent ions can be generated under the conditions of photoionization sources, the detection sensitivity is improved, which is at least 100 times higher than the existing literature reports.

Embodiment 3

[0030] image 3 Ion mobility spectrograms showing the effect of different transfer tube temperatures on the detection of acetone reagent ions and TATP by dopant-assisted ionization source ion mobility spectrometry. Figure 4 are the signal intensity changes of product ion peaks at different transfer tube temperatures and the assignment of product ions. During the experiment, the temperature of the transfer tube was 40°C to 120°C, the temperature of the injector was 60°C, and the flow rates of carrier gas (air) and drift gas (air) were 200mL / min and 500mL / min, respectively. It can be seen from the figure that when the temperature of the transfer tube is controlled at 120°C, the optimal separation effect can be obtained. This is because when the transfer tube temperature is high, the TATP product ion peak is in front of the reagent ion peak, and the characteristic is relatively strong, and as the transfer tube temperature increases, the signal intensity is stronger

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Abstract

The invention discloses a new method for onsite rapid, sensitive and accurate detection of a trace quantity of explosive peroxide. The analysis method for ion mobility spectrometry analysis of a trace quantity of a novel explosive peroxide TATP is established in a thermal desorption sample introduction mode by adopting a positive ion manner with ion mobility spectrometry as a basic detection technology. The method improves the detection resolution and sensitivity by adjusting the temperature of a mobility tube and the temperature of a sample introduction port, realizes high sensitivity detection of the explosive TATP, and allows the detection limit to reach ng magnitude.

Description

technical field [0001] The invention relates to a new on-site rapid, sensitive and accurate detection method for ng-level novel peroxide explosive TATP. Taking ion mobility spectrometry as the basic detection technology, adopting positive ion mode and thermal analysis sample injection method, an analytical method for ion mobility spectrometry analysis of peroxide explosive TATP was established. This patent discusses that it is equipped with a thermal analysis injector, uses acetone as a dopant to assist ionization source ion mobility spectrometry, and improves the resolution and sensitivity of detection by adjusting the temperature of the transfer tube and the temperature of the inlet of the thermal analysis injector. The mass calibration curve realizes highly sensitive detection of trace explosives, and at the same time, this method eliminates the influence of interfering substances, and can effectively detect TATP. Background technique [0002] Peace and development have ...

Claims

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Application Information

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IPC IPC(8): G01N27/64
Inventor 李海洋温萌程沙沙周庆华彭丽英
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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