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Electro membrane extraction using sorbent filled porous membrane bag.

Nyi Nyi Naing1, Sam Fong Yau Li1, Hian Kee Lee1

  • 1Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore; National University of Singapore Environmental Research Institute, T-Lab # 02-01, 5A Engineering Drive 1, Singapore 117411, Singapore.

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Summary

A novel electro membrane extraction-solid-liquid phase microextraction (EME-SLPME) method effectively determines phenolic contaminants in water. This technique utilizes a reduced graphene oxide/polyvinyl alcohol sorbent for high extraction efficiency and sensitive detection.

Keywords:
Electro membrane extractionGas chromatography–mass spectrometryPhenolic contaminantsSorbent

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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry
  • Materials Science

Background:

  • Phenolic compounds are common water contaminants requiring sensitive detection methods.
  • Existing methods for phenolic contaminant analysis can be complex and time-consuming.
  • Development of efficient and selective extraction techniques is crucial for environmental monitoring.

Purpose of the Study:

  • To develop and validate a novel electro membrane extraction-solid-liquid phase microextraction (EME-SLPME) technique.
  • To determine phenolic contaminants in water samples.
  • To utilize a reduced graphene oxide/polyvinyl alcohol composite as a sorbent material.

Main Methods:

  • Synthesized a reduced graphene oxide/polyvinyl alcohol sorbent.
  • Employed a three-phase microextraction system with direct immersion sampling.
  • Utilized an electrical potential difference to drive analyte transport.
  • Analyzed derivatized analytes using gas chromatography-mass spectrometry.

Main Results:

  • Achieved high extraction efficiency with relative recoveries up to 99.6%.
  • Established a wide linearity range (0.05–100 μg L⁻¹) with excellent coefficients of determination (r² = 0.987–0.996).
  • Obtained low limits of detection (0.003–0.053 μg L⁻¹).

Conclusions:

  • The developed EME-SLPME method is highly efficient for extracting phenolic contaminants from water.
  • The reduced graphene oxide/polyvinyl alcohol sorbent demonstrates excellent performance.
  • This method offers a sensitive and reliable approach for environmental water analysis.