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Analyte Adsorption and Distribution01:09

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In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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Updated: Dec 5, 2025

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Determination of multi-class polyaromatic compounds in sediments by a simple modified matrix solid phase dispersive

F Portet-Koltalo1, Y Tian2, I Berger-Brito1

  • 1Normandie University, UNIROUEN, COBRA Laboratory UMR CNRS 6014, 55 Rue Saint Germain, 27000, Evreux, France.

Talanta
|October 20, 2020
PubMed
Summary

A new matrix solid phase dispersive extraction (MSPD) method efficiently analyzes polycyclic aromatic hydrocarbons (PAHs) and polychlorobiphenyls (PCBs) in sediments. This optimized MSPD method offers improved recoveries and reduced solvent use compared to traditional techniques.

Keywords:
Extraction and purificationGreen sample preparationPolychlorobiphenylsPolycyclic aromatic hydrocarbonsSedimentsSolid phase dispersion

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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry

Background:

  • Polycyclic aromatic hydrocarbons (PAHs) and polychlorobiphenyls (PCBs) are persistent organic pollutants found in sediments.
  • Accurate analysis of PAHs and PCBs in complex matrices like sediment is crucial for environmental monitoring.

Purpose of the Study:

  • To optimize a matrix solid phase dispersive extraction (MSPD) method for simultaneous analysis of PAHs and PCBs in sediments.
  • To compare the efficiency of the optimized MSPD method with microwave-assisted extraction (MAE).

Main Methods:

  • Optimization of MSPD using novel dispersing agents (3-chloropropyl-bonded silica, Florisil).
  • Development of a compromise elution solvent (hexane/acetone) for both PAHs and PCBs.
  • Comparison of MSPD with microwave-assisted extraction (MAE) and other traditional methods.

Main Results:

  • Achieved low procedural detection limits for PAHs (0.06-0.22 ng g⁻¹) and PCBs (0.3-1.1 ng g⁻¹).
  • Obtained good mean extraction recoveries (>67% for PAHs, >89% for PCBs) with high precision.
  • Demonstrated superior PCB recoveries compared to sonication, Soxhlet, and MAE methods.
  • MSPD reduced sample amount, solvent consumption, and matrix effects compared to MAE.

Conclusions:

  • The optimized MSPD method is a simple, efficient, and robust technique for simultaneous analysis of PAHs and PCBs in sediments.
  • MSPD offers advantages over MAE in terms of reduced matrix effects and improved extraction efficiency for PCBs.
  • The method's robustness was confirmed across sediments with diverse sources and mineralogical characteristics.