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Method for detecting polycyclic aromatic hydrocarbon in soil

A technology of polycyclic aromatic hydrocarbons and detection methods, which is applied in measurement devices, instruments, material analysis by optical means, etc., to achieve the effects of short analysis time, many detection items, and simple steps

Pending Publication Date: 2021-05-25
XIAMEN PUSHI NANO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using Raman spectroscopy to detect PAHs in soil, the technical difficulty lies in the extraction of PAHs in soil and the development of a surface-enhanced Raman test program for simultaneous detection of multiple PAHs

Method used

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  • Method for detecting polycyclic aromatic hydrocarbon in soil
  • Method for detecting polycyclic aromatic hydrocarbon in soil
  • Method for detecting polycyclic aromatic hydrocarbon in soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: S1, sample treatment: take 1g soil sample (containing 0.2mg / kg indeno[1,2,3-cd]pyrene) in a beaker, add 5mL petroleum ether for ultrasonic extraction, take 2mL supernatant Solid-phase extraction column, the lower layer of the solid-phase extraction column filler is alumina, the upper layer is anhydrous sodium sulfate, the column height is 1 cm (the upper and lower layers are respectively high 0.5 cm), the filtrate is collected in a volatile bottle, and dried with nitrogen;

[0033] S2, sample elution: take 200 μL of acetonitrile in the above-mentioned volatile bottle, shake it and use it as the test solution for later use;

[0034] S3, Raman detection: Take 50 μL of the solution to be tested, add 100 μL of nano-silver sol and 100 μL of sodium chloride solution with a concentration of 1 mol / L in sequence, mix well and put it in a Raman spectrometer for detection.

Embodiment 2

[0035] Embodiment 2: S1, sample processing: take 5g soil sample (containing 0.1mg / kg benzo [a] anthracene) in the beaker, add 20mL dichloromethane ultrasonic extraction, take 5mL supernatant and pass through the solid phase extraction column, The solid phase extraction column packing is 200-300 mesh silica gel, the column height is 0.5cm, the filtrate is collected in a volatile bottle, and blown dry with nitrogen;

[0036] S2, sample elution: take 500 μL of ethanol in the above-mentioned volatile bottle, shake it and use it as the test solution for later use;

[0037] S3, Raman detection: Take 100 μL of the solution to be tested, add 100 μL of 0.1 mol / L sodium sulfate solution and 500 μL of nano-gold sol in sequence, mix well and put it in a Raman spectrometer for detection.

Embodiment 3

[0038] Example 3: S1, sample processing: take 10g of soil samples in the environment (containing 1mg / kg fluoranthene, 1mg / kg benzo[e]pyrene, 1mg / kg phenanthrene) in a beaker, add 40mL ethyl acetate for ultrasonic extraction , take 5mL supernatant to pass through the solid phase extraction column, the solid phase extraction column packing is PEP, the column height is 0.3cm, the filtrate is collected in a volatile bottle, and blown dry with nitrogen;

[0039] S2, sample elution: take 500 μL of dimethylformamide in the above-mentioned volatile bottle, shake it and use it as the test solution for later use;

[0040] S3, Raman detection: Take 50 μL of the solution to be tested, add 200 μL of 0.1 mol / L sodium nitrate solution and 200 μL nano-gold sol in sequence, mix well and put it in a Raman spectrometer for detection.

[0041] The result of embodiment 1,2 and 3 sees respectively figure 1 , figure 2 and image 3 . Depend on figure 1 It can be seen that the surface-enhanced R...

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Abstract

The invention discloses a method for detecting polycyclic aromatic hydrocarbon in soil, which comprises the following steps: S1, sample treatment: taking a proper amount of sample in a beaker, and adding a non-polar organic solvent for extraction; enabling the extracted supernatant to pass through a solid-phase extraction column, collecting the filtrate into a volatilization bottle, and performing blow-drying with nitrogen; s2, sample elution: taking a proper amount of a strong polar organic solvent into the volatilization bottle, performing oscillating, and adding a proper amount of an inorganic salt flocculant as a to-be-detected solution for later use; s3, Raman detection: taking a proper amount of the to-be-detected solution in the S2, adding a proper amount of metal sol, and performing detecting in a portable Raman spectrometer. According to the method, the polycyclic aromatic hydrocarbons in the soil are monitored by using the surface enhanced Raman spectroscopy, and the method has the advantages of simple steps, short analysis time and the like.

Description

technical field [0001] The invention relates to the field of environmental monitoring, in particular to a method for detecting polycyclic aromatic hydrocarbons in soil. Background technique [0002] Polycyclic aromatic hydrocarbons (Polycyclic Aromatic Hydrocarbons, PAHs) are compounds containing two or more benzene rings in the molecule, and their structures are arranged in linear, angular or clustered ring structures. PAHs in the environment mainly come from incomplete combustion of carbon-containing compounds, oil seepage stored in nature, and biosynthesis of certain plants and microorganisms. PAHs are stable in nature, difficult to degrade in the environment, can accumulate in organisms, and have "carcinogenic, teratogenic, and mutagenic" effects. my country's national standard GB36600-2018 "Soil Environmental Quality Construction Land Soil Pollution Risk Management and Control Standards" stipulates the maximum limit of polycyclic aromatic hydrocarbons in the soil, of w...

Claims

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 陈宏炬叶少清赵晨曾勇明陈启振刘国坤
Owner XIAMEN PUSHI NANO TECH CO LTD
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