Surface enhanced Raman detection method for polycyclic aromatic hydrocarbon and substitute thereof

A surface-enhanced Raman and substitution technology, which is applied in Raman scattering, material excitation analysis, etc., can solve the problems of unfavorable specific detection of polycyclic aromatic hydrocarbons, weak binding ability between modifiers and metal substrates, etc., and achieve rapid characterization and the effect of trace detection

Inactive Publication Date: 2011-04-06
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has the disadvantages of weak binding ability between the modifier and the metal substrate and the constant change of the internal cavity size of calixarene, which is not conducive to the specific detection of polycyclic aromatic hydrocarbons.

Method used

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  • Surface enhanced Raman detection method for polycyclic aromatic hydrocarbon and substitute thereof
  • Surface enhanced Raman detection method for polycyclic aromatic hydrocarbon and substitute thereof
  • Surface enhanced Raman detection method for polycyclic aromatic hydrocarbon and substitute thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: SERS detection of trace amounts of polycyclic aromatic hydrocarbons

[0021] (1) Dissolve the trace amount of boron to be measured in ethanol to prepare different concentrations of boron to be tested (concentrations of 1×10 -4 , 1×10 -5 mol / L, 1×10 -6 mol / L, 1×10 -7 mol / L, 1×10 -8 mol / L);

[0022] (2) The preparation of gold sol is to combine HAuCl 4 First prepare a 0.01% distilled water solution, take 100mL of the solution and heat it to boiling, accurately add 1mL of a 1% mass concentration of 1% trisodium citrate distilled water solution under agitation, continue to heat and boil for 15 minutes, cool to room temperature and restore the volume to 100mL with distilled water . Then mix 1mL of gold sol and 1mL (10 -6 mol / L) The distilled aqueous solution of cyclodextrin substituted with sulfhydryl group is mixed overnight, the particle size of the gold sol is 50nm;

[0023] (3) Take 50uL each of the test solution prepared in step (1) and the solution in step (2) and...

Embodiment 2

[0026] Example 2: SERS qualitative identification of a variety of polycyclic aromatic hydrocarbon mixtures

[0027] Same as the operation of each step in Example 1, the difference is that step (1) is a mixture of four polycyclic aromatic hydrocarbons, namely anthracene, anthracene, triphenylene and triphenylene, each with a concentration of 1×10 -5 mol / L. The obtained SERS spectra of four polycyclic aromatic hydrocarbon mixtures ( figure 2 ), the SERS spectrum of the mixture contains the SERS characteristic peaks of each PAH. The spectrum reflects the characteristic Raman vibrations of the four mixtures of anthracene, anthracene, triphenylene and triphenanthrene, and proves that the present invention can qualitatively identify polycyclic aromatic hydrocarbons.

Embodiment 3

[0028] Example 3: SERS trace detection of a variety of polycyclic aromatic hydrocarbon mixtures

[0029] The same as the operation of each step in Example 1, the difference is that step (1) is a mixture of anthracene, anthracene, benzophenanthrene, and anthracene. The concentration of anthracene changes, and the concentration of anthracene, benzophenanthrene and benzophenanthrene remains unchanged (both 1×10 -5 mol / L), and respectively measure the SERS spectra ( image 3 ). As the concentration of anthracene changes in the mixture, the intensity of the three characteristic Raman peaks of anthracene also changes. From the variation of Raman peak intensity with the concentration of anthracene, trace detection of the content of anthracene in the mixture can be performed, so the present invention can also be used for trace SERS detection of a variety of polycyclic aromatic hydrocarbons.

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Abstract

The invention belongs to the technical field of organic pollutant detection, and particularly relates to a method for quickly, qualitatively and quantitatively detecting polycyclic aromatic hydrocarbon and substitute thereof by using surface enhanced Raman technology. The method comprises the following steps of: dissolving the polycyclic aromatic hydrocarbon and the substitute thereof into an organic solvent; mixing gold sol and mercapto substituted cyclodextrin to form surface enhanced substrate solution; mixing the solution of the polycyclic aromatic hydrocarbon and the substitute thereof and the surface enhanced substrate solution with equal volume, centrifuging the mixed solution, and then diluting the solution to the original volume by using water; and dripping the solution to be detected on a glass sheet, drying the solution under room temperature condition, and then performing Raman detection to obtain Raman spectrums of the polycyclic aromatic hydrocarbon and the substitute thereof to be detected so as to realize quick, qualitative and quantitative detection of the polycyclic aromatic hydrocarbon and the substitute thereof. The detection method has the characteristics of simple and quick operation and high sensitivity, has great application potential on the detection aspect of the polycyclic aromatic hydrocarbon and the substitute thereof, and can provide a new detection means for the polycyclic aromatic hydrocarbon and the substitute thereof.

Description

Technical field [0001] The invention belongs to the technical field of organic pollutant detection, and particularly relates to a method for rapid qualitative and trace detection of polycyclic aromatic hydrocarbons and their substitutes by using surface enhanced Raman technology. Background technique [0002] Polycyclic aromatic hydrocarbons are organic compounds containing two or more benzene rings or heterocycles and their substitutions. These compounds are hardly soluble in water but easily soluble in organic solvents. They are produced when organic matter such as coal, petroleum, wood, tobacco, and organic polymer compounds are incompletely burned. They are the main environmental and food pollutants, and a considerable part of them are carcinogenic. [0003] At present, the recognized methods for detecting the content of polycyclic aromatic hydrocarbons and their substitutes in water quality are mainly liquid phase extraction and solid phase extraction high performance liquid c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 王旭谢云飞赵冰阮伟东宋薇徐蔚青
Owner JILIN UNIV
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