Preparation and evaluation of amino modified graphene solid phase microextraction fiber and its application to the determination of synthetic musks in water samples.
In the current study, amino modified (NH2 modified) graphene was developed as a solid phase microextraction (SPME) coating for the first time. The structure of the NH2 modified graphene was characterized by X ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) The fiber was fabricated using xylene diluted silicone sealant as an adhesion agent. The performance and feasibility of the NH2 modified graphene fiber was evaluated through autosampler assisted direct immersion (DI) SPME followed by gas chromatography mass spectrometry (GC/MS) for the analysis of five synthetic musks (muscone, galaxolide, musk xylene, tonalide and musk ketone) in aqueous samples. The results showed that the prepared fiber had good thermal stability, excellent solvent resistance and a long service lifetime (more than 200 replicate extraction cycles) The proposed autosampler assisted DI SPME GC/MS method showed low limits of detection (0.46 5.96 ng L( 1) wide linear ranges (5 500 ng L( 1) and acceptable reproducibility (relative standard deviation, RSD<12% Finally, the method was successfully applied to the analysis of synthetic musks in environmental water samples with good recoveries (82.3 112% and satisfactory precisions (RSD<9.9% These results indicated that the NH2 modified graphene provided a promising alternative in sample pretreatment.
Journal of chromatography. A