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Related Experiment Videos

Fluorometric determination of Ethofenprox in water by using solid-phase extraction.

M Nakamura1, T Igarashi, S Yamada

  • 1Faculty of Engineering, Shizuoka University, Hamamatsu, Japan.

Fresenius' Journal of Analytical Chemistry
|February 28, 2001
PubMed
Summary

Ethofenprox, a pesticide, shows strong UV fluorescence enhanced by solvents and surfactants. A novel solid-phase extraction method effectively determines this compound in various water samples.

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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry
  • Spectroscopy

Background:

  • Ethofenprox is a widely used pesticide.
  • Its inherent fluorescence properties in the UV region are notable.
  • Understanding its behavior in different media is crucial for environmental monitoring.

Purpose of the Study:

  • To investigate the fluorescence characteristics of Ethofenprox.
  • To develop and optimize a solid-phase extraction (SPE) method for Ethofenprox determination.
  • To apply the developed method for analyzing Ethofenprox in real water samples.

Main Methods:

  • Fluorescence spectroscopy was employed to study Ethofenprox in aqueous solutions, organic solvents, and micellar media.
  • Solid-phase extraction (SPE) using Sep Pak C8 cartridges was optimized for sample preparation.

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  • Gas chromatography-mass spectrometry (GC-MS) or High-Performance Liquid Chromatography (HPLC) with UV detection was likely used for quantification, though not explicitly stated.

    • Main Results:

    • Ethofenprox fluorescence intensity increased in organic solvents and with surfactants, with minimal wavelength shifts.
    • Sep Pak C8 cartridges proved effective for SPE due to Ethofenprox's hydrophobicity.
    • A 40% methanol addition facilitated complete elution and removed matrix interferences.
    • Linear calibration was achieved from 0.03 to 2.4 mg L(-1).

    Conclusions:

    • The study successfully characterized Ethofenprox's fluorescence behavior.
    • An efficient SPE method was developed for Ethofenprox extraction from water.
    • The method demonstrated high accuracy and recovery (93.2-95.7%) for determining Ethofenprox in diverse water sources.