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Method for detecting artificial synthetic pigment by combination of thin layer chromatography technique and surface enhanced Raman spectroscopy technique

A technology of surface-enhanced Raman and synthetic pigments, applied in Raman scattering, measurement devices, material analysis by optical means, etc. problem, to achieve the effect of low cost, high sensitivity and simple operation process

Inactive Publication Date: 2018-10-23
XUZHOU NORMAL UNIVERSITY
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Problems solved by technology

[0003] However, surface-enhanced Raman scattering substrates usually need to be formed through complex physical or chemical methods, and most of them do not have the characteristics of reusability, so there is a waste of resources and labor, and the problem of increased detection costs

Method used

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  • Method for detecting artificial synthetic pigment by combination of thin layer chromatography technique and surface enhanced Raman spectroscopy technique
  • Method for detecting artificial synthetic pigment by combination of thin layer chromatography technique and surface enhanced Raman spectroscopy technique

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Experimental program
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Embodiment

[0018] Example: TLC-Surface Enhanced Raman Spectroscopy combined with six synthetic pigments, the specific operation steps are as follows.

[0019] 1. Fix a glass substrate with a length of 2.5cm and a width of 0.5cm on the surface of the sample stage with heat-resistant Teflon tape, facing the direction of steam incidence, when the chamber pressure is less than 10 -6 During Torr, a layer of 20nm titanium film is evaporated by electron beam deposition coating method to make the surface structure have good adhesion with the glass substrate. Raman scattering structure, after the cavity is cooled, make the normal line of the sample stage and the steam incident direction be 85°, continue to evaporate 2000nm silver film to form the upper surface enhanced Raman scattering silver nanorod array structure, and finally obtain the silver nanorod array base.

[0020] 2. Add 600 μL of anhydrous methanol to a quartz cuvette with a length of 2 cm, a width of 2 cm, and a height of 3 cm. Anhy...

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Abstract

The invention discloses a method for detecting artificial synthetic pigment by combination of a thin-layer chromatography technique and a surface enhanced Raman spectroscopy technique, comprising thefollowing steps: A, preparation of a silver nanorod array substrate: a titanium film and a silver film are deposited on the surface of a glass substrate by a glancing angle deposition technique, and the glancing angle is regulated and then the silver nanorod continues to be deposited; B, development of thin-layer chromatography: development of thin-layer chromatography is carried out on artificialsynthetic pigments on the silver nanorod array substrate by using methanol; C, surface enhanced Raman spectroscopy detection: Raman spectroscopy detection is carried out on a sample after the development. The method provided by the invention can help quickly distinguish different artificial synthetic pigments, and has the advantages of simple operation process, low cost, high sensitivity and thelike.

Description

technical field [0001] The invention relates to a method for detecting artificially synthesized pigments by combining thin-layer chromatography technology and surface-enhanced Raman spectroscopy technology. The invention discloses a method for detecting artificially synthesized pigments with combined technology, which belongs to the technical field of material food detection. Background technique [0002] At present, surface-enhanced Raman spectroscopy has become a powerful analytical tool, which extends the surface vibrational spectrum and provides possible solutions to a large number of chemical problems. In reagent diagnosis, some ideal surface-enhanced Raman scattering substrates have high requirements, such as: high enhancement performance, good repeatability, strong uniformity, stable life, and simple manufacture. [0003] However, surface-enhanced Raman scattering substrates usually need to be formed through complex physical or chemical methods, and most of them do n...

Claims

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Application Information

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IPC IPC(8): G01N30/90G01N30/94G01N21/65
CPCG01N21/658G01N30/90G01N30/94
Inventor 韩彩芹姚悦
Owner XUZHOU NORMAL UNIVERSITY
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