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Rapid and accurate detection method for ammonium nitrate explosive

A technology of ammonium nitrate explosives and a detection method, applied in the field of analytical chemistry, to achieve the effects of high detection sensitivity, good reproducibility, and rapid analysis

Inactive Publication Date: 2014-10-22
杨丽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there has been no report on the detection of explosive residues by capillary electrophoresis using ionic liquids as a buffer solution

Method used

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  • Rapid and accurate detection method for ammonium nitrate explosive

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Experimental program
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Effect test

Embodiment 1

[0028] A fast and accurate detection method for ammonium nitrate explosives, comprising the steps of:

[0029] Step (1), preparing an ionic liquid stock solution: adding 1-ethyl-3-methylimidazolium tetrafluoroborate into deionized water to a concentration of 20 mM to obtain an ionic liquid stock solution;

[0030] Step (2), prepare standard NH 4 + and NO 3 - Stock solution: Weigh ammonium chloride and magnesium nitrate hexahydrate respectively, dissolve in deionized water, dilute to 1000ppm as standard NH 4 + and NO 3 - stock solution;

[0031] Step (3), preparing ionic liquid capillary electrophoresis buffer solution: diluting the ionic liquid stock solution in step (1) to 6 mM, adding 4 μl of ethanolamine diluted 400 times to each 1 ml of ionic liquid, and mixing evenly to obtain a buffer solution;

[0032] Step (4), capillary pretreatment: cut off a 50cm long capillary, burn a window of 2-3mm at 10cm, wash the capillary with 0.1 M sodium hydroxide and water respecti...

Embodiment 2

[0036] A fast and accurate detection method for ammonium nitrate explosives, comprising the steps of:

[0037] Step (1), preparing an ionic liquid stock solution: adding 1-butyl-3-methylimidazolium tetrafluoroborate into deionized water to a concentration of 20 mM to obtain an ionic liquid stock solution;

[0038] Step (2), prepare standard NH 4 + and NO 3 - Stock solution: Weigh ammonium chloride and magnesium nitrate hexahydrate respectively, dissolve in deionized water, dilute to 1000ppm as standard NH 4 + and NO 3 - stock solution;

[0039] Step (3), preparing ionic liquid capillary electrophoresis buffer solution: diluting the ionic liquid stock solution in step (1) to 6 mM, adding 4 μl of ethanolamine diluted 400 times to each 1 ml of ionic liquid, and mixing evenly to obtain a buffer solution;

[0040] Step (4), capillary pretreatment: cut off a 50cm long capillary, burn a window of 2-3mm at 10cm, wash the capillary with 0.1M sodium hydroxide and water respectiv...

Embodiment 3

[0044] A fast and accurate detection method for ammonium nitrate explosives, comprising the steps of:

[0045] Step (1), preparing an ionic liquid stock solution: adding 1-butyl-3-methylimidazolium hexafluorophosphate to deionized water to a concentration of 20 mM to obtain an ionic liquid stock solution;

[0046] Step (2), prepare standard NH 4 + and NO 3 - Stock solution: Weigh ammonium chloride and magnesium nitrate hexahydrate respectively, dissolve in deionized water, dilute to 1000ppm as standard NH 4 + and NO 3 - stock solution;

[0047] Step (3), preparing ionic liquid capillary electrophoresis buffer solution: diluting the ionic liquid stock solution in step (1) to 6 mM, adding 4 μl of ethanolamine diluted 400 times to each 1 ml of ionic liquid, and mixing evenly to obtain a buffer solution;

[0048] Step (4), capillary pretreatment: cut off a 50cm long capillary, burn a window of 2-3mm at 10cm, wash the capillary with 0.1M sodium hydroxide and water respectiv...

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Abstract

The invention relates to a rapid and accurate detection method for an ammonium nitrate explosive and belongs to the technical field of analytical chemistry. The method comprises the following six steps of preparing an ionic liquid stock solution, preparing standard NH4<+> and NO3<-> stock solutions, preparing an ionic liquid capillary electrophoresis buffer solution, preprocessing a capillary tube, measuring a normal concentration curve and analyzing exploding remnants. The detection method has the beneficial effects that a novel green solvent, namely ionic liquid, simultaneously serves as the electrophoresis buffer solution and an indirect ultraviolet detection back-ground electrolyte, so that the disadvantages that multiple reagents need to be used, the operation is complex, and the environment is polluted in a conventional method are overcome; furthermore, main ingredients, namely NH4<+> and NO3<-> ions of the exploding remnants of the ammonium nitrate explosive can be simultaneously separated and detected by virtue of the method, and the method is specific to the detection of the ammonium nitrate explosive; meanwhile, by combining an efficient capillary electrophoresis-ultraviolet detection technique, the analysis is accurate and rapid, the detection sensitivity is high, the reproducibility is good, the dosage of the reagent is low, and the method is easy to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry, and in particular relates to an environment-friendly rapid and accurate detection method for ammonium nitrate explosives. Background technique [0002] Ammonium nitrate explosive is a powdery explosive mechanical mixture with ammonium nitrate as the main component. It is one of the most widely used industrial explosives. Rapid detection of trace explosive residues can provide clues and evidence for detecting explosion cases. It is one of the important contents of explosive evidence inspection and identification, and it is of great significance to the field of social security. The detection methods for ammonium nitrate explosives mainly include chemical drop analysis, ion selective electrode method, infrared spectroscopy, capillary electrophoresis analysis, scanning electron microscope / energy spectrometer (SEM / EDX) method and ion chromatography, etc., generally for ammonium nitrate ex...

Claims

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Application Information

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IPC IPC(8): G01N27/447
Inventor 杨丽刘心谢文林徐晓宇付娆
Owner 杨丽
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