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Method for improving laser Raman spectrum detection sensitivity with molecularly imprinted material

A technology of laser Raman spectroscopy and detection sensitivity, which is applied in the direction of material excitation analysis, Raman scattering, etc., can solve the problems of high price and poor use effect, and achieve the effect of improving detection sensitivity

Inactive Publication Date: 2012-08-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Raman spectroscopy can be used for structural analysis and qualitative detection of substance molecules, which can be used for substance identification. The detection technology of liquid explosives based on Raman spectroscopy technology is becoming a research hotspot. At present, there are already such technologies in the security inspection market in Europe and the United States. The product is in use, and this kind of product can also be bought in China, but the price is expensive
In addition, the existing Raman spectroscopy security inspection equipment can only detect the liquid in the transparent container at a short distance, which has great limitations in practical application and the use effect is not good

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  • Method for improving laser Raman spectrum detection sensitivity with molecularly imprinted material

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Embodiment

[0011] A method for improving the sensitivity of laser Raman spectroscopy to detect nitrated ethylene glycol by using nitroethylene glycol molecularly imprinted membranes, and using a portable laser Raman spectrometer for detection, the specific steps are: put an aqueous solution of nitrated ethylene glycol with a mass concentration of 30% into a transparent glass bottle, then put the glass bottle into the sample tank of the laser Raman spectrometer, coat the nitrated ethylene glycol molecularly imprinted membrane on the probe of the laser Raman spectrometer, and then detect the nitrated ethylene glycol ; Set the power and the integration time of the laser Raman spectrometer before detection; figure 1 As shown in the figure, we can see that 1648cm -1 (w-m) is NO 2 The asymmetric stretching vibration peak of the , 1284cm -1 (vs) is NO 2 The symmetrical stretching vibration peak of the , 560cm -1 (m) is NO 2 The deformation vibration peak of , 1039cm -1 (m-s) is C-C-O stre...

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Abstract

Belonging to the technical field of laser Raman spectrum detection, the invention relates to a method for improving laser Raman spectrum detection sensitivity with a molecularly imprinted material. Detection with a portable laser Raman spectrometer comprises the steps of: placing a sample to be detected into a transparent glass bottle, then putting the glass bottle into a sample cell, making a probe of the laser Raman spectrometer and the molecularly imprinted material act on the sample to be detected simultaneously for detection; and before detection, setting the power and integration time of the laser Raman spectrometer respectively at 10-100mW and 1-20s. The method of the invention can improve the detection sensitivity of the laser Raman spectrometer.

Description

technical field [0001] The invention relates to a method for improving the sensitivity of laser Raman spectrum detection by using molecular imprinted materials, and belongs to the technical field of laser Raman spectrum detection. Background technique [0002] Because the Raman shift is related to the vibration and rotation energy levels of molecules, the vibration and rotation energy levels of molecules of different substances are different, so there are different Raman shifts, that is, different Raman spectra. Raman spectroscopy can be used for structural analysis and qualitative detection of substance molecules, which can be used for substance identification. The detection technology of liquid explosives based on Raman spectroscopy technology is becoming a research hotspot. At present, there are already such technologies in the security inspection market in Europe and the United States. The products are in use, and such products can also be bought in China, but they are e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 王银杰刘吉平刘小娟刘泽权
Owner BEIJING INSTITUTE OF TECHNOLOGYGY