Method for quickly determining trinitrotoluene or hexogen in solution

A technology for rapid determination of trinitrotoluene, which is applied in the field of ion mobility spectrometer determination, can solve the problems that the content is difficult to accurately determine and cannot be suitable for rapid on-site analysis, etc., and achieves the effects of accurate quantification and wide applicability

Inactive Publication Date: 2008-04-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Its content is difficult to determine accurately, and cannot meet the requirements of on-site rapid analysis

Method used

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  • Method for quickly determining trinitrotoluene or hexogen in solution
  • Method for quickly determining trinitrotoluene or hexogen in solution

Examples

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Effect test

Embodiment 1

[0015] After weighing a certain amount of solid TNT with an analytical balance, prepare a 1 mg / mL TNT solution with analytical pure acetone. Take this solution and dilute it 100 times to a 10 μg / mL solution. Take 1uL of this solution, that is, 10ngTNT, drop it on the sample paper, heat it to about 200°C for thermal analysis, inject the carrier gas into the ion mobility spectrometer for quantitative detection, and obtain a signal of 1.0mV. The measured TNT spectrum is shown in figure 1 . The conditions for the quantitative determination of ion mobility spectrometry are: the ion source is 10mCi 63 Ni, the transfer tube length is 10cm, the transfer electric field is -280V / cm, the ion gate opening time is 0.5ms, the cycle is 50ms, the carrier gas flow rate is 100mL / min, the drift flow rate is 300mL / min, and the test temperature is 100°C-150°C , and the injection temperature was 200°C.

Embodiment 2

[0017] After weighing a certain amount of solid RDX (RDX) with an analytical balance, prepare a 1 mg / mL RDX solution with analytical pure acetone. Take this solution and dilute it 100 times to a 10 μg / mL solution. Take 1uL of this solution, that is, 10ngRDX, drop it on the sample paper, heat it to about 200°C for thermal analysis, and quantitatively detect it by injecting the carrier gas into the ion mobility spectrometer, and obtain a signal of 0.3mV. The measured RDX spectrum is shown in figure 1 . The conditions for the quantitative determination of ion mobility spectrometry are: the ion source is 10mCi 63 Ni, the transfer tube length is 10cm, the transfer electric field is -280V / cm, the ion gate ion gate opening time is 0.5ms, the cycle is 50ms, the carrier gas flow rate is 100mL / min, the drift flow rate is 300mL / min, and the test temperature is 100℃- 150°C, and the injection temperature is 200°C.

Embodiment 3

[0019] After weighing a certain amount of solid TNT with an analytical balance, prepare a 1 mg / mL TNT solution with analytical pure acetone. Take 100uL of this solution, that is, 100ugTNT, drop it on the sample paper, heat it to about 200°C for thermal analysis, and quantitatively detect it by injecting the carrier gas into the ion mobility spectrometer, and obtain a signal of 4.0mV. The measured TNT spectrum is shown in figure 2 . The conditions for the quantitative determination of ion mobility spectrometry are: the ion source is 10mCi 63 Ni, the transfer tube length is 10cm, the transfer electric field is -280V / cm, the ion gate ion gate opening time is 0.5ms, the cycle is 50ms, the carrier gas flow rate is 100mL / min, the drift flow rate is 300mL / min, and the test temperature is 100℃- 150°C, and the injection temperature is 200°C.

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Abstract

The invention provides a method for quickly determining the trinitrotoluene or RDX in solution. The trinitrotoluene or RDX is dissolved in acetone to get solution of 10Mu g / mL to 1mg / mL; and then, 1uL to 100uL of such solution, i.e. 10ng to 100ug trinitrotoluene or RDX is fetched and dropped onto the sampling paper; finally, after heating, quantitative detection is available by use of ion mobility spectrometry. Apart from quick and effective, the method of quickly determining the trinitrotoluene or RDX in solution has the advantages of accurate quantification and extensive application, and can quantitatively analyze solid samples.

Description

technical field [0001] The invention belongs to an ion mobility spectrometer measuring method, in particular to a method for quickly measuring trinitrotoluene or RDX in a solution by using an ion mobility spectrometer. Background technique [0002] Ion Mobility Spectrometry (IMS) technology is a separation and detection technology that appeared abroad in the 1970s, and was applied to on-site analysis and detection in the 1980s. The gas sample is ionized to form ions, which then drift in an applied electric field. Due to the different mobilities of different samples, the different components in the sample are separated in the transfer tube, and in general, heavier molecules travel slower than lighter molecules. In this way, the composition of the sample can be known from the measured migration time. At the same time, the quantitative calculation is based on the relationship between the peak area and the concentration, and there is a direct proportional relationship between ...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/00H01J49/40
Inventor 李芳王海龙李京华李海洋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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