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A Simple Method for Automated Solid Phase Extraction of Water Samples for Immunological Analysis of Small Pollutants

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A convenient method for epichlorohydrin determination in water using headspace-solid-phase microextraction and gas

M Lasa¹, R Garcia, E Millán

¹Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080-San Sebastián, Spain.

Journal of Chromatographic Science

|August 24, 2006

Summary

This study presents an optimized method for epichlorohydrin determination in water using headspace-solid-phase microextraction and gas chromatography. The developed procedure offers sensitive and reliable quantification of epichlorohydrin in environmental water samples.

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Published on: May 25, 2021

Area of Science:

Analytical Chemistry
Environmental Science

Background:

Epichlorohydrin is a significant environmental contaminant.
Accurate determination of epichlorohydrin in water is crucial for environmental monitoring.

Purpose of the Study:

To develop and optimize a simple, sensitive, and reliable method for epichlorohydrin determination in water.
To apply the optimized method for analyzing epichlorohydrin levels in wastewater treatment plant water.

Main Methods:

Optimization of headspace-solid-phase microextraction (HS-SPME) conditions using a two-step experimental design (fractional factorial and central composite).
Gas chromatography (GC) with flame ionization detection (FID) and electron capture detection (ECD) for epichlorohydrin quantification.
Analysis of water samples from four treatment plants using the standard addition method.

Main Results:

Optimized HS-SPME conditions include a poly(dimethylsiloxane)-divinylbenzene fiber, 20 min extraction at 5°C, 300 g/L NaCl, and 20 mL HS volume in a 40-mL vial.
GC-FID achieved a limit of detection (LOD) of 1.8 µg/L and a relative standard deviation (RSD) of 3.8% at 25 µg/L.
GC-ECD provided a lower LOD of 0.08 µg/L and an RSD of 6.6% at 5 µg/L.
Epichlorohydrin was detected in raw water samples from three wastewater treatment plants.

Conclusions:

The developed HS-SPME-GC method is effective for the sensitive determination of epichlorohydrin in water.
The method is suitable for monitoring epichlorohydrin in environmental water matrices, including wastewater.
The optimized procedure provides reliable results for epichlorohydrin quantification in complex samples.