title: Preparation and evaluation of amino modified graphene solid-phase microextraction fiber and its application to the determination of synthetic musks in water samples.
abstract: 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.
authors.affiliation: MOE Key Laboratory of Aquatic Product Safety/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Siyan
authors.initials: S
authors.lastname: Li
authors.affiliation: MOE Key Laboratory of Aquatic Product Safety/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China. Electronic address: ceszhuf@mail.sysu.edu.cn.
authors.forename: Fang
authors.initials: F
authors.lastname: Zhu
authors.affiliation: MOE Key Laboratory of Aquatic Product Safety/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Ruifen
authors.initials: R
authors.lastname: Jiang
authors.affiliation: MOE Key Laboratory of Aquatic Product Safety/KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China. Electronic address: cesoygf@mail.sysu.edu.cn.
authors.forename: Gangfeng
authors.initials: G
authors.lastname: Ouyang
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000379:methods*; D005229:Fatty Acids, Monounsaturated / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D006108:Graphite / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D015203:Reproducibility of Results; D052617:Solid Phase Microextraction; D014867:Water / Q000737:chemistry*; D014992:Xylenes / Q000032:analysis
chemical_list: D005229:Fatty Acids, Monounsaturated; D014992:Xylenes; D014867:Water; C008563:musk; D006108:Graphite
keywords: Amino modified graphene; Solid-phase microextraction; Synthetic musks; Water samples