Novel method for identifying and detecting explosive
A technology of explosives and compounds, applied in the field of identification and detection of explosives, can solve problems such as human harm, and achieve the effect of avoiding use
Inactive Publication Date: 2012-05-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
[0006] The traditional ionization source for measuring the ion mobility spectrum of explosives is 63 Ni source, although it can detect explosives with high sensitivity, but 63 The radioactivity of Ni has certain harm to the human body in application
Method used
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Embodiment 1
[0030] image 3 Shown is the ion mobility spectrum of TNT measured without doping acetone under the above experimental conditions. It can be seen from the figure that there is no response to TNT when acetone is not doped.
Embodiment 2
[0032] Figure 4 Shown is the ion mobility spectrum of TNT measured under the above experimental conditions. It can be seen from the figure that the migration time of the product ion peak formed by TNT is 15.64ms.
Embodiment 3
[0034] Figure 5 Shown is the ion mobility spectrum of AFNO measured under the above experimental conditions. It can be seen from the figure that the migration time of the product ion peak formed by AFNO is 11.94ms.
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The invention relates to a method for identifying and detecting an explosive. According to the invention, an ion mobility spectrometry technology which takes an UV light source as an ionization source is used, air is taken as carrier gas and floating gas, easily ionized compound is doped in carrier gas for detecting the explosive under a negative ion mode. According to the method, the concentration of the easily ionized compound in the carrier gas is adjusted for regulating and controlling the concentration of the reactive ion, the sensitivity of the detection on the explosive can be increased, and the detection of the explosive can be realized in a rapid, real time online and high sensitive mode.
Description
technical field [0001] The invention provides a method for identifying and detecting explosives. The invention adopts the ion mobility spectrometry technology of the ultraviolet light source as the ionization source, uses air as the carrier gas and the drift gas, and at the same time, easily ionized compounds are doped in the carrier gas to detect explosives in negative ion mode. Ion mobility spectrometry is mainly used to characterize various chemical substances through the mobility of gas-phase ions, so as to achieve the purpose of analyzing and detecting various substances. The ion mobility spectrometry of the ultraviolet light source is mainly for the ionization detection of compounds whose ionization energy is lower than its photon ability, and usually works in the positive ion mode. After doping easily ionizable compounds, the ion mobility spectrometry of the ultraviolet light source can be used to detect compounds with strong electronegativity in negative ion mode. B...
Claims
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Inventor 李海洋程沙沙陈创王卫国王新杜永斋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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