A rapid space-resolved solid-phase microextraction method as a powerful tool to determine contaminants in wine based...

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Heterogeneous sample analysis requires selective and simultaneous detection methods.
• Solid-phase microextraction (SPME) is a versatile technique for trace analysis.
• Developing novel materials for SPME can enhance sensitivity and selectivity.

Purpose of the Study:

• To develop a novel space-resolved solid-phase microextraction (SR-SPME) technique for simultaneous analyte monitoring.
• To utilize graphene (G) and graphene oxide (GO) coated segmented fibers for the extraction of contaminants with different volatilities.
• To assess the performance of the developed SR-SPME method for analyzing 2,4,6-trichloroanisole (TCA) and dibutyl phthalate (DBP) in complex matrices.

Main Methods:

• Development of a space-resolved SPME fiber by coating graphene and graphene oxide onto segmented fiber supports.
• Optimization of extraction conditions for simultaneous analysis of TCA and DBP.
• Application of the developed SR-SPME method for the analysis of TCA and DBP in wine samples.

Main Results:

• The space-resolved fiber demonstrated good precision (5.4%, 6.8%) and low detection limits (0.3 ng/L for both TCA and DBP).
• Wide linearity was achieved for both analytes, ranging from 1.0 to 250.0 ng/L.
• Satisfactory recoveries (96.96% for TCA, 98.20% for DBP) were obtained in the simultaneous analysis of wine samples.

Conclusions:

• The novel SR-SPME technique using G/GO coated fibers is effective for simultaneous determination of contaminants with varying volatilities.
• The method exhibits excellent analytical performance, including precision, sensitivity, and linearity.
• This technique holds promise for efficient and simultaneous analyte monitoring in complex real-world samples like wine.