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A kind of method for detecting moisture content in tetrahydrofuran by carbon nanoparticles

A technology of carbon nanoparticles and tetrahydrofuran, which is applied in the field of analysis and detection, achieves the effects of simple preparation, huge application prospects, and low detection limit

Active Publication Date: 2018-09-14
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the detection of water content in tetrahydrofuran, and the detection method used in this patent is simple in principle and easy to operate

Method used

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  • A kind of method for detecting moisture content in tetrahydrofuran by carbon nanoparticles
  • A kind of method for detecting moisture content in tetrahydrofuran by carbon nanoparticles
  • A kind of method for detecting moisture content in tetrahydrofuran by carbon nanoparticles

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Embodiment 1

[0028] A method for preparing carbon nanoparticles capable of detecting moisture content in tetrahydrofuran, comprising the following steps:

[0029] (1) Prepare p-phenylenediamine and PEG with a molecular weight of 400 at a mass ratio of 10:2 to prepare a uniform aqueous solution, seal it in a hydrothermal reaction kettle, and place it in an oven at 140°C for 24 hours;

[0030] (2) Concentrating the reaction solution obtained in step (1) to saturation, purifying the product through a silica gel column, and preparing a carbon nanoparticle capable of detecting the water content in tetrahydrofuran.

Embodiment 2

[0032] A method for preparing carbon nanoparticles capable of detecting moisture content in tetrahydrofuran, comprising the following steps:

[0033] (1) Mix p-phenylenediamine and PEG with a molecular weight of 600 at a mass ratio of 10:3, make a uniform aqueous solution, seal it in a hydrothermal reaction kettle, and place it in an oven at 160°C for 24 hours;

[0034] (2) Concentrating the reaction solution obtained in step (1) to saturation, purifying the product through a silica gel column, and preparing a carbon nanoparticle capable of detecting the water content in tetrahydrofuran.

Embodiment 3

[0036] A method for preparing carbon nanoparticles capable of detecting moisture content in tetrahydrofuran, comprising the following steps:

[0037] (2) Mix p-phenylenediamine and PEG with a molecular weight of 800 at a mass ratio of 10:5 to prepare a uniform aqueous solution, seal it in a hydrothermal reaction kettle, and place it in an oven at 180°C for 28 hours;

[0038] (3) Concentrate the reaction solution obtained in step (1) to saturation, and purify the product through a silica gel column to prepare a carbon nanoparticle capable of detecting the water content in tetrahydrofuran.

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PUM

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Abstract

The invention discloses a method for detecting the water content in tetrahydrofuran through carbon nanoparticles. The carbon nanoparticles are prepared with p-phenylenediamine and polyethylene glycol (PEG) as the raw materials, and the water content in tetrahydrofuran can be rapidly detected through high-sensitivity fluorescence. In the detection process, while the water content in tetrahydrofuran is increased, the fluorescent strength is gradually weakened, and obvious red shift happens to the corresponding maximum emission wavelength. Compared with an existing technology for detecting the water content in solvent, the method has the advantages pf being low in detection limit, high in sensitivity, wide in detection range, simple, rapid, free of expensive detection instruments, small in prepared carbon nanoparticle size, simple in preparation procedure and low in investment cost. On the basis of the advantages, the detection method is expected to be widely applied in the technical field of analysis and detection.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, and in particular relates to the application of carbon nanoparticles in detecting the water content in tetrahydrofuran. Background technique [0002] Water is an important chemical reagent and a good solvent in many chemical reactions, its importance is self-evident. But in many reactions, such as anhydrous and oxygen-free experiments, the water content in the organic solvent will have an important impact on the reaction results, such as determining the product of the reaction, the yield and the selectivity of the reaction. Tetrahydrofuran is a common solvent for anhydrous and oxygen-free experiments, so it is very necessary to detect the water content in tetrahydrofuran. Moreover, the characterization of water content is also an important indicator in many market products, such as chemical, food, pharmaceutical, synthetic fiber, plastic and other products. Therefore, the detectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/64
Inventor 陈建吕锟钟维邦李亚王宏张培盛
Owner HUNAN UNIV OF SCI & TECH