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A rotating disk sorptive extraction based on hydrophilic deep eutectic solvent formation.

Andrey Shishov1, Natalia Volodina1, Svetlana Gagarionova1

  • 1Department of Analytical Chemistry, Institute of Chemistry, Saint-Petersburg University, Saint Petersburg State University, SPbSU, SPbU, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia.

Analytica Chimica Acta
|November 29, 2020
PubMed
Summary

A novel method uses a rotating disk with deep eutectic solvent to extract polar phenolic compounds from non-polar oil samples. This efficient technique offers rapid preconcentration and selective separation for improved analysis.

Keywords:
Deep eutectic solventHPLC-FLDPhenolic compoundsRotating diskRotating disk sorptive extractionSorptionVegetable oil

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Area of Science:

  • Analytical Chemistry
  • Separation Science

Background:

  • Traditional methods for extracting polar analytes from non-polar matrices are often time-consuming and inefficient.
  • Deep eutectic solvents (DES) offer unique properties for selective analyte interactions and extraction.

Purpose of the Study:

  • To develop and present a novel preconcentration method for polar analytes in non-polar matrices.
  • To utilize hydrophilic deep eutectic solvent formation on a rotating disk for efficient separation of phenolic compounds from vegetable oil.

Main Methods:

  • Coating a poly(vinylidene fluoride-co-tetrafluoroethylene) rotating disk with choline chloride (DES precursor).
  • Immersion of the coated disk in vegetable oil samples for sorption of phenolic compounds (hydrogen bond donors).
  • Elution of analytes using aqueous phase decomposition of the hydrophilic DES, followed by high-performance liquid chromatography with fluorescence detection.

Main Results:

  • Achieved limits of detection for phenolic compounds in the range of 10-60 μg L⁻¹.
  • Demonstrated significantly reduced sorption and elution times compared to existing rotating disk sorptive extraction methods.
  • Reported absolute extraction recovery for target analytes between 66-87% due to selective DES formation.

Conclusions:

  • The developed method provides an elegant and efficient approach for preconcentrating polar analytes from complex non-polar matrices.
  • Deep eutectic solvent formation on a rotating disk enables selective separation and rapid extraction of phenolic compounds.
  • This technique offers a promising advancement in sample preparation for analytical chemistry applications.