Application of magnetic carbon nanotube composite nanospheres in magnetic solid-phase extraction of trace perfluoroalkyl substances from environmental water samples

• Published in: Talanta (Oxford) 2023-02, Vol.253, p.123930-123930, Article 123930
• Main Authors: Song, Xin-Li, Lv, Hui, Liao, Ke-Chao, Wang, Dong-Dong, Li, Gui-Mei, Wu, Yi-Yao, Chen, Qian-Yu, Chen, Yue
• Format: Article
• Language: English
• ISSN: 0039-9140; 1873-3573
• DOI: 10.1016/j.talanta.2022.123930

The layer-by-layer assembly technique was used to synthesize novel multiwalled carbon nanotubes (MWCNTs) on magnetic carbon (Fe O @C) nanospheres, which were then used to extract six perfluoroalkyl substances (PFAS) in environmental real water samples using ultra high-performance liquid chromatography coupled to tandem mass spectrometry. The as-synthesized sorbent MWCNTs@Fe O @C was employed for magnetic solid-phase extraction (MSPE). The as-prepared MWCNTs@Fe O @C was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and vibrating sample magnetometer (VSM). The main extraction parameters were systematically optimized by Box-Behnken design. Under optimal conditions, excellent results were achieved. The synthesized sorbent showed wide linear ranges (0.1-1000 ng L ), low detection limits (0.03-0.09 ng L ) and good repeatability (3.80%-9.52%) for extracting and detecting six PFAS. The developed method was also applied to analyze six PFAS from environmental water samples. This study indicated that MWCNTs@Fe O @C composites are promising materials for the extraction and determination of PFAS from water samples.