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Method for analyzing polycyclic aromatic hydrocarbon in soil by utilizing matrix solid phase dispersion extraction

A matrix solid-phase, polycyclic aromatic hydrocarbon technology, applied in the field of polycyclic aromatic hydrocarbons, can solve the problem of lack of selectivity of dispersants, achieve the effects of saving organic solvents, improving selectivity, and simplifying the analysis process

Active Publication Date: 2017-06-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, commonly used dispersants in matrix solid-phase dispersive extraction a

Method used

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  • Method for analyzing polycyclic aromatic hydrocarbon in soil by utilizing matrix solid phase dispersion extraction
  • Method for analyzing polycyclic aromatic hydrocarbon in soil by utilizing matrix solid phase dispersion extraction
  • Method for analyzing polycyclic aromatic hydrocarbon in soil by utilizing matrix solid phase dispersion extraction

Examples

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Example Embodiment

[0038] Example 1: (1) Preparation of phenyl-modified magnesium oxide microsphere adsorbent with high selectivity to polycyclic aromatic hydrocarbons; (2) The mass ratio of soil sample to step (1) adsorbent is 4:1 to 1 :4 Mix, transfer to a mortar and grind for 1-20min (such as image 3 (3) Put 10-100 mg of the adsorbent in step (1) into the extraction column as a purification layer; (4) transfer the homogeneous mixture obtained in step (2) to the extraction column in (3). Use solvent to rinse the extraction column, the eluent flows out of the extraction column by gravity to remove interfering substances. The volume of solvent used and the mass ratio of the homogeneous mixture are 10-20mL:1g; (5) continue the extraction column in step (4) Use the eluent for elution, and use the solvent volume to use the solvent volume and the mass ratio of the homogeneous mixture in the extraction column to be 10-20mL:1g; (6) Put the eluent in (5) at 30-40℃ Nitrogen is concentrated to near dryne...

Example Embodiment

[0039] Example 2: The difference between this embodiment and specific example 1 is: the specific preparation steps of silane reagent-modified magnesium oxide microspheres in step (1) are: a. Using magnesium nitrate and potassium carbonate in the crystals of basic magnesium carbonate The precursor of magnesium oxide is prepared under kind induction, the secondary product is fully washed and vacuum dried, and finally calcined at high temperature, sieved, and settled to obtain magnesium oxide microspheres with a particle size of 8-15 μm; b. The magnesium oxide microspheres are vacuum dried at 50-100°C. In an anhydrous toluene system, add a certain quality of dry magnesium oxide microspheres and surfactants, reflux for 1 to 3 hours, and the volume ratio of the added magnesium oxide microspheres to toluene is 1g: 20-60 mL, and magnesium oxide is added The mass ratio of the microspheres to the surfactant mass is 100:1 to 500:1. Under the condition of magnetic stirring, add a certain...

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Abstract

The invention relates to a method for analyzing polycyclic aromatic hydrocarbon in soil by utilizing matrix solid phase dispersion extraction. The method comprises the following steps: firstly, preparing phenyl modified magnesium oxide microspheres, and taking the phenyl modified magnesium oxide microspheres as adsorbent for matrix solid-phase dispersion extraction; secondly, grinding the adsorbent with a soil sample; thirdly, transferring the uniformly ground sample into an extraction column, leaching and eluting the column, removing leaching liquid and collecting eluting liquid; and finally, concentrating the eluting liquid, and analyzing with an instrument after a proper amount of solvent id dissolved. According to the method, the adsorbent is simple in preparation method, and polycyclic aromatic hydrocarbon in soil can be quickly analyzed by using the method.

Description

technical field [0001] The invention relates to a method for analyzing polycyclic aromatic hydrocarbons in soil by using matrix solid phase dispersion extraction. Background technique [0002] Polycyclic aromatic hydrocarbons are a class of fused-ring aromatic compounds containing 2 to 7 benzene rings in the molecule, mainly derived from incomplete combustion of organic matter. In addition, PAHs are difficult to degrade in the environment and can diffuse over long distances, so they are widely present in the environment. Some polycyclic aromatic hydrocarbons have teratogenic, carcinogenic and mutagenic properties, which pose a potential threat to human health. At present, 16 kinds of polycyclic aromatic hydrocarbons have been included in the list of priority pollutants by the US Environmental Protection Agency (USEPA). Therefore, it is of great significance for the detection and evaluation of PAHs in environmental samples. [0003] The analysis of polycyclic aromatic hydr...

Claims

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Application Information

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IPC IPC(8): G01N30/08
CPCG01N30/08
Inventor 陈吉平谭冬芹金静李芳倪余文王刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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