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Fluorescent gel test paper and fluorescent sol, preparation method and application thereof

A technology of test paper and fluorescence, which is applied in the field of detection and analysis of explosives, can solve the problems of troublesome purification, loss of materials, complex structure of fluorescent ligands, etc., and achieve the effect of simple production method, fast detection speed and stable properties

Active Publication Date: 2021-03-16
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current Chinese patent documents CN106596493A and CN107167462A, CN107286327A disclosed nitro explosive detection test paper, the fluorescent materials loaded on the test paper are mostly soluble fluorescent materials, which are easily transferred to the aqueous phase system or organic phase during the detection process. The loss or dilution of the material will easily cause the fluorescence intensity of the test paper itself to weaken, thereby reducing the sensitivity of the test paper
Moreover, the synthesis process of fluorescent materials is relatively complicated, with one more step, and the structure of the fluorescent ligand is also very complicated, and the post-synthesis treatment and purification operations are very troublesome, which restricts the application of fluorescent test paper.

Method used

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  • Fluorescent gel test paper and fluorescent sol, preparation method and application thereof
  • Fluorescent gel test paper and fluorescent sol, preparation method and application thereof
  • Fluorescent gel test paper and fluorescent sol, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method of fluorescent gel test paper, comprising the steps of:

[0052] Step 1: Preparation of organic ligand DDT:

[0053] as attached figure 1 As shown, 2H-(1,2,3)triazole-4,5-dicarbonitrile, sodium azide and zinc chloride were dissolved in water. The clear solution was heated to reflux for 3 hours, then cooled to room temperature, and concentrated hydrochloric acid was added while cooling at 0°C. The precipitate was removed by suction filtration, and the crude product was washed with water, ethanol and ether to obtain 4,5-bis(1H-tetrazol-5-yl)-2H-1,2,3-triazole hydrate.

[0054] Step 2: Preparation of fluorescent colloid:

[0055] DDT (102.5mg, 5×10 -4 M) and Cd(NO 3 ) 2 4H 2 O (154mg, 5×10 -4 M) was dissolved in DMF (0.5mL), then placed at 80°C for 15 minutes to obtain a high-viscosity translucent sol, and then the resulting material was diluted with DMF (4.5mL) to obtain a yellow transparent solution of evening primrose, as shown in the attach...

Embodiment 2

[0059] A preparation method of fluorescent gel test paper, comprising the steps of:

[0060] Step 1: Preparation of organic ligand DDT:

[0061] 2H-(1,2,3)triazole-4,5-dicarbonitrile, sodium azide and zinc chloride were dissolved in water. The clear solution was heated to reflux for 3 hours, then cooled to room temperature, and concentrated hydrochloric acid was added while cooling at 0°C. The precipitate was removed by suction filtration, and the crude product was washed with water, ethanol and ether to obtain 4,5-bis(1H-tetrazol-5-yl)-2H-1,2,3-triazole hydrate.

[0062] Step 2: Preparation of fluorescent colloid:

[0063] DDT (205mg, 1×10 -3 M) and Cd(NO 3 ) 2 4H 2 O (600mg, 2×10 -3 M) Dissolved in DMF (1.0 mL), then placed at 80° C. for 20 minutes to obtain a high-viscosity translucent sol, then the resulting material was diluted with DMF (9 mL) to obtain a yellow transparent solution of evening primrose.

[0064] Step 3: put the filter paper or cotton swab into the...

Embodiment 3

[0067] A preparation method of fluorescent gel test paper, comprising the steps of:

[0068] Step 1: Preparation of organic ligand DDT:

[0069] 2H-(1,2,3)triazole-4,5-dicarbonitrile, sodium azide and zinc chloride were dissolved in water. The clear solution was heated to reflux for 3 hours, then cooled to room temperature, and concentrated hydrochloric acid was added while cooling at 0°C. The precipitate was removed by suction filtration, and the crude product was washed with water, ethanol and ether to obtain 4,5-bis(1H-tetrazol-5-yl)-2H-1,2,3-triazole hydrate.

[0070] Step 2: Preparation of fluorescent colloid:

[0071] DDT (156mg, 5.5×10 -4 M) and Cd(NO 3 ) 2 4H 2 O (400mg, 1.5×10 -3 M) Dissolved in DMF (1.0 mL), then placed at 80° C. for 20 minutes to obtain a high-viscosity translucent sol, then the resulting material was diluted with DMF (9 mL) to obtain a yellow transparent solution of evening primrose.

[0072] Step 3: put the filter paper or cotton swab into...

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Abstract

The invention discloses fluorescence gel test paper, a preparation method and application thereof, fluorescence sol and a preparation method and application thereof. The preparation method of the fluorescence gel test paper includes the steps of firstly, mixing organic ligands DDT with Cd(NO3)2, and dissolving with DMF; secondly, baking in a drying oven to obtain semi-solid gel; thirdly, taking out, diluting the gel to obtain sol, and loading the sol onto a paper material to obtain the fluorescence gel test paper. The fluorescence gel test paper has the advantages that the fluorescence gel test paper is easy in raw material obtaining, simple in preparation method, unaffected by external environments, capable of being stored for a long time and fast in detection; after a nitrobenzene explosive solution is dropwise added to the test paper or the test paper is used to wipe a sample with an explosive, ethanol is dropwise added to the test paper for activation, and the dried fluorescence gel test paper is placed under an ultraviolet lamp to observe the fluorescence change of the test paper through naked eyes so as to judge whether the sample contains the explosive or not.

Description

technical field [0001] The invention relates to a detection test paper, in particular to a fluorescent gel test paper for rapid detection of nitrobenzene explosives and its preparation method and application, and also relates to a fluorescent sol and its preparation method and application, belonging to the detection and analysis of explosives technology field. Background technique [0002] Nitrobenzene explosives are a common type of dangerous explosives, which pose a great threat to national security and people's lives in terrorist attacks. In addition, during the production and transportation of explosives, it is also easy to penetrate into the soil and groundwater, becoming a highly toxic carcinogen to humans. When people inhale such compounds, they can cause liver lesions, regeneration disorders Diseases such as anemia and cataracts have a great negative impact on the environment, and also cause great harm to the health of the people. Therefore, it is crucial to study ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64G01N21/78
CPCG01N21/6402G01N21/78
Inventor 何璇张祺刘渝刘毅陈建波赵川德
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS