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Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
09:42

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Published on: August 7, 2016

Effervescence-assisted dispersive micro-solid phase extraction.

Guillermo Lasarte-Aragonés1, Rafael Lucena, Soledad Cárdenas

  • 1Department of Analytical Chemistry, Institute of Fine Chemistry and Nanochemistry, Marie Curie Building, Campus de Rabanales, University of Córdoba, 14071 Córdoba, Spain.

Journal of Chromatography. A
|November 11, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a novel effervescent tablet for solid-phase microextraction, enhancing nitroaromatic compound detection. The method improves extraction efficiency and allows for sensitive analysis in water samples.

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Area of Science:

  • Analytical Chemistry
  • Environmental Science

Background:

  • Extraction efficiency is limited by surface area.
  • Dispersing the extractant increases surface area and improves extraction.

Purpose of the Study:

  • To develop a novel effervescent tablet for solid-phase microextraction.
  • To enhance the dispersion of sorbent materials for improved extraction efficiency.
  • To determine nitroaromatic compounds in water samples.

Main Methods:

  • Fabrication of an effervescent tablet containing sorbent (OASIS-HLB) and CO2 precursors.
  • In situ generation of carbon dioxide for sorbent dispersion within a 10 mL-glass syringe.
  • Analysis of five nitroaromatic compounds using ultra-performance liquid chromatography (UPLC) with UV detection.

Main Results:

  • Achieved absolute recoveries of 61-85% for nitroaromatic compounds.
  • Demonstrated relative recoveries close to 100%, indicating no matrix effects.
  • Enabled determination at the microgram per liter level with good precision (RSD < 6.1%).

Conclusions:

  • The effervescent tablet method significantly enhances microextraction efficiency.
  • This technique provides a sensitive and precise method for analyzing nitroaromatic compounds in water.
  • The approach is suitable for trace-level environmental monitoring.