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A kind of test paper for detecting nitrobenzene explosives and its preparation method and application

A technology of nitrobenzene and detection test paper, which is applied in the field of environmental analysis, can solve the problems of limited sensor application and inability to effectively distinguish, and achieve the effects of broad application prospects, good detection sensitivity, and convenient detection

Active Publication Date: 2020-08-04
宁波鉴合科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another problem is the problem of naked eye observation. Under the irradiation of ultraviolet light, the filter paper will reflect blue fluorescence, so the naked eye cannot effectively distinguish the blue fluorescence on the filter paper, which limits the use of the sensor in low-concentration nitrobenzene explosives. Applications in Visual Inspection

Method used

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  • A kind of test paper for detecting nitrobenzene explosives and its preparation method and application
  • A kind of test paper for detecting nitrobenzene explosives and its preparation method and application
  • A kind of test paper for detecting nitrobenzene explosives and its preparation method and application

Examples

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Embodiment 1

[0036] Embodiment 1: the preparation of nitrobenzene explosives detection test paper.

[0037] Firstly, the PPE-OBS is synthesized through four steps, and finally the synthetic PPE-OBS is used to make the test paper for the detection of nitrobenzene explosives. The first step is to synthesize 1,4-bis(ethyl 4-oxyl-butanoic acid)benzene (M 1 ), under an argon atmosphere, hydroquinone and ethyl 4-bromobutyrate were refluxed for 24 hours to obtain 1,4-bis(ethyl 4-oxyl-butyric acid)benzene. The second step, use KIO 3 and I 2 Will M 1 Iodination of the benzene ring to give 1,4-bis(ethyl 4-oxy-butanoic acid)-2,5-diiodobenzene (M 2 ). The third step, 1,4-diethylbenzene and M 2 Polymerization occurs under the catalysis of tetrakistriphenylphosphine palladium to obtain the polymer precursor PPE-OBE. The fourth step is to hydrolyze the ester of PPE-OBE side chain into sodium carboxylate to obtain the final product PPE-OBS. The intermediate and final products were characterized by...

Embodiment 2

[0049] Example 2 Measurement of Fluorescent Properties of PPE-OBS Fluorescent Probes

[0050] Take 0.0224g of the PPE-OBS powder prepared in Example 1 and dissolve it with boric acid / sodium hydroxide buffer solution (0.2mol / L, pH=9.5) and settle it into a 500mL volumetric flask to prepare a PPE-OBS powder with a monomer concentration of 100μmol / L. PPE-OBS stock solution, keep away from light. Take 1500μL from the stock solution and add it to a 5mL centrifuge tube, add 30μL of picric acid standard solution (0.01mol / L) and dilute it to 3mL with boric acid-sodium hydroxide buffer solution (0.2mol / L, pH=9.5), measure its fluorescent properties. Depend on figure 2 It can be seen that the maximum fluorescence excitation wavelength of the fluorescent probe is 400 nm, and the maximum emission wavelength is 512 nm.

[0051] Take 1500 μL from the fluorescent probe stock solution in Example 2 and add it to a 5mL centrifuge tube. Add picric acid at a concentration of 1.0×10 -6 mol / L,...

Embodiment 3

[0052] Example 3 The detection of nitrobenzene explosives by the nitrobenzene explosives detection test paper

[0053] Figure 4 The fluorescence response curve of the nitrobenzene explosives detection test paper to picric acid is shown; Figure 5 The relationship between the fluorescence intensity of the nitrobenzene explosives detection test paper and the concentration of picric acid is shown. The addition of picric acid quenched the fluorescence of the test paper for the detection of nitrobenzene explosives, indicating that the test paper had a sensitive response to picric acid. The test paper for the detection of nitrobenzene explosives has a good linear response to low concentrations of picric acid.

[0054] The nitrobenzene explosives detection test paper has a yellow-green background under the ultraviolet light, and 2 μL of nitrobenzene explosives detection test paper is added dropwise to the concentration of 4mmol / L, 2mmol / L, 1mmol / L, 0.1mmol / L L of picric acid solu...

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Abstract

The invention discloses a test paper for nitrobenzene explosives and a preparation method and applications thereof, and relates to the technical field of environmental analysis. First of all, PPE-OBS is synthesized by four steps; finally, the test paper for nitrobenzene explosives is prepared from the synthesized PPE-OBS; a testing sample solution is dripped on the test paper, or testing sample solid is placed on the test paper, whether or not the sample contains nitrobenzene explosives is determined by the fluorescence quenching of the test paper. The test paper has the advantages that raw materials are easy to obtain, the cost is low, the fluorescence intensity is high in the synthesized test paper, visual inspection can be achieved, the detection sensitivity is high, and the detection is convenient, and thus the test paper has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental analysis, and in particular relates to a fluorescent test paper capable of visually and quickly detecting the content of nitrobenzene explosives in a sample and a production method thereof. Background technique [0002] Nitrobenzene explosives are a common class of dangerous explosives, and polynitroaromatic compounds are highly explosive. Nitroaromatic explosives in the environment mainly come from military activities such as waste water produced in the industrial production of explosives and waste bomb treatment, and shooting and shelling. Human health poses a great threat. Short-term exposure to nitrobenzene explosives can strongly irritate the skin and cause allergic dermatitis, etc.; long-term exposure can cause liver and kidney diseases and tissue inflammation. If it is taken by mistake, it will cause symptoms such as hemolysis, and if it is taken by mistake in a large dose, there wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 冯国栋刘吉林
Owner 宁波鉴合科技有限责任公司
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