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Graphene coating bonded onto stainless steel wire as a solid-phase microextraction fiber
Min Sun1, Juanjuan Feng1, Yanan Bu1
1Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
Talanta
|January 26, 2015
Summary
A novel graphene-coated fiber was developed for solid-phase microextraction (SPME). This durable fiber enables sensitive analysis of n-alkanes in environmental samples using gas chromatography (GC).
Area of Science:
- Analytical Chemistry
- Materials Science
Background:
- Solid-phase microextraction (SPME) is a widely used technique for sample preparation.
- Developing novel, stable, and efficient SPME fibers is crucial for trace analysis.
Purpose of the Study:
- To fabricate and characterize a graphene-coated stainless steel wire as a new SPME fiber.
- To develop and validate a sensitive SPME-GC method for n-alkane analysis.
Main Methods:
- Graphene coating on stainless steel wire fabricated and characterized using SEM and EDX.
- Direct-immersion SPME coupled with gas chromatography (GC).
- Optimization of extraction and desorption conditions.
Main Results:
- The graphene coating exhibited a rough, crinkled structure (~1 μm), enhancing extraction efficiency.
- A sensitive SPME-GC method was established with a wide linearity range (0.2–150 μg L⁻¹) and low limits of determination (0.05–0.5 μg L⁻¹).
- The method was successfully applied to analyze n-alkanes in rainwater and soil samples with good recoveries (80.6–120%).
Conclusions:
- The graphene-coated fiber demonstrates high thermal and chemical stability.
- This novel SPME fiber offers a promising alternative for the sensitive and reliable analysis of organic pollutants in environmental matrices.
