Application of ceramic/carbon composite as a novel coating for solid-phase microextraction.

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Solid-phase microextraction (SPME) is a widely used technique for sample preparation.
• Developing novel coatings with enhanced properties is crucial for improving SPME efficiency and stability.

Purpose of the Study:

• To develop and characterize a new ceramic/carbon composite coating for SPME.
• To optimize the SPME method using this novel coating for the analysis of organophosphorus pesticides (OPPs).

Main Methods:

• Fabrication and characterization of a ceramic/carbon composite coating on stainless steel fibers.
• Optimization of SPME parameters including extraction time, stirring rate, ionic strength, and desorption conditions.
• Analysis of OPPs in aqueous samples using gas chromatography with a flame thermionic detector (GC-FTD).

Main Results:

• The ceramic/carbon coating demonstrated high extraction quantities, excellent thermal and organic solvent stability, and good mechanical characteristics.
• Optimized SPME method showed high reproducibility (RSD < 8.5%) and low limits of detection (5.2–34.6 ng L⁻¹).
• The method achieved high recovery rates (86.2–103.4%) for OPPs in real water samples.

Conclusions:

• The developed ceramic/carbon composite coating is a promising material for SPME applications.
• The optimized SPME method provides a sensitive and reliable approach for OPP determination in aqueous matrices.