Colorimetric reagent for detecting urotropin

A technology of urotropine and reagents, which is applied in the field of colorimetric reagents for detecting urotropine, can solve problems such as unsuitable analysis and detection, and achieve the effects of stable and clear color development, strong anti-interference, and low cost

Pending Publication Date: 2022-07-29
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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Problems solved by technology

Other colorimetric methods for the detection of urotropine usually require heating or an acidic environment to decompose urotropine to produce formaldehyde (Analytical Letters 2000,33,2901-2912), and indirectly realize the detection of urotropine by detecting formaldehyde, while heating or Acidic environment is not suitable for on-site analysis and detection

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  • Colorimetric reagent for detecting urotropin
  • Colorimetric reagent for detecting urotropin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] At room temperature, 15 mg of Fast Blue B fluoroborate was weighed and dissolved in 30 mL of ethanol, and ultrasonicated for 10 min until uniform, to obtain a colorimetric reagent for detecting non-standard explosive raw material urotropine.

[0021] Drop 20 μL of the aqueous solution of urotropine to be tested into 3 mL of the detection reagent to obtain a mixed solution with a concentration of 265 μM of urotropine, and the change of the solution from pale yellow to bright yellow can be observed within 2s ( figure 1 ), indicating that there is the presence of unstandardized explosive raw material urotropine in the test material, the reaction speed is fast, the color recognition is obvious, and the color development is stable.

Embodiment 2

[0023] At room temperature, 7 mg of Fast Blue B zinc chloride salt was weighed and dissolved in 30 mL of ethylene glycol methyl ether, and ultrasonicated for 10 min until uniform, to obtain a colorimetric reagent for detecting non-standard explosive raw material urotropine.

[0024] Drop 20 μL of the aqueous solution of urotropine to be tested into 3 mL of the detection reagent to obtain a mixed solution with a concentration of 662 μM of urotropine. The change of the solution from light yellow to orange can be observed within 2s ( figure 1 ), indicating that there is the presence of unstandardized explosive raw material urotropine in the test material, the reaction speed is fast, the color recognition is obvious, and the color development is stable.

Embodiment 3

[0026] At room temperature, 43 mg of Fast Blue B fluoroborate was weighed and dissolved in 30 mL of methanol, and ultrasonicated for 10 min until uniform, to obtain a colorimetric reagent for detecting non-standard explosive raw material urotropine.

[0027] Drop 20μL solution of interfering substances that may coexist with urotropine (including daily necessities, explosive materials or explosives and structural similarities) solution into 3mL of detection reagent, the difference between the absorption intensity at 461nm and the difference before detection The values ​​indicate that none of the interfering substances interfered with the detection of urotropine. Among them, common daily necessities include flour, salt, sugar, laundry detergent, hand sanitizer, toothpaste and toilet water, and explosive materials or explosives include sodium perchlorate, calcium hypochlorite, pentaerythritol, 2,4,6-trinitro Toluene (TNT) and triacetone triperoxide (TATP), structural analogs incl...

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Abstract

The invention relates to a colorimetric reagent for detecting urotropin. The reagent is prepared from solid blue B salt and an organic solvent. The preparation method of the colorimetric reagent is simple, safe and mild, quick, naked-eye, specific, high-sensitivity and high-stability recognition can be carried out on urotropin, the response time is shorter than 2 s, the expiration date of the reagent is as long as half a year, the selectivity is very high, and the detection limit of a solution is 9 mu M. The reagent provides a very effective technical means for the detection of the raw material urotropine of the non-standard explosive, and provides an excellent fundamental research for the field of safety detection of the non-standard explosive.

Description

technical field [0001] The invention belongs to the field of non-standard explosive raw material detection and analysis, and provides a colorimetric reagent for detecting urotropine. The reagent has low detection limit, strong anti-interference and short reaction time, and can realize the purpose of low-cost, real-time colorimetric detection of urotropine. Background technique [0002] Hexojin (RDX) is one of the most widely used elemental explosives at present, with the characteristics of high power and high detonation speed. Hexamethylene triperoxide diamine (HMTD) is a non-standard explosive with high impact sensitivity, the preparation method is simple, and the raw materials are readily available. Urotropine (HA) is the main raw material for the production of RDX (RDX) and hexamethylene triperoxide diamine (HMTD), and because it is often used as a key ingredient in sterilants, pesticides and curing agents, it is widely used in It is very easy to obtain in daily life. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/01
CPCG01N21/78G01N21/01G01N2021/0112
Inventor 窦新存任文飞祖佰祎何源
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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