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- W3037310147 abstract "An efficient and robust solid-phase microextraction (SPME) fiber was developed for vacuum-assisted sampling of polycyclic aromatic hydrocarbons (PAHs) in solid samples. The surface of a stainless-steel fiber was first oxidized and then coated with nanostructured n-octadecylsilica using the Stöber method, by hydrolysis and condensation of tetraethylorthosilicate in the presence of octadecyltrichlorosilane through a sol–gel strategy. The synthesized sorbent was characterized using scanning electron microscopy/energy dispersive X-ray analysis (SEM/EDX) and Fourier transform infrared spectroscopy (FT-IR). The developed vacuum-assisted headspace SPME (VA-HS-SPME) procedure was coupled with GC-FID and optimized for the analysis of PAHs in soil, using multivariate statistical analysis, based on Box-Behnken design. The calibration graphs for seven PAHs were linear (R2 > 0.995) over 0.001–4000 ng g−1. The limits of detection were found to be 0.1–0.9 pg g−1. The relative standard deviations for six repeated analyses of 100 ng g−1 of the PAHs (using a single fiber) were calculated 3.2–8.7% and fiber-to-fiber reproducibility (n = 6) obtained 5.2–12.34%. The nanostructured octadecylsilica was shown to be substantially robust and durable. It was utilized for ultrasensitive VA-HS-SPME/GC analysis of the PAHs in different polluted soil samples and satisfactory results were obtained, with low matrix effects." @default.
- W3037310147 created "2020-07-02" @default.
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- W3037310147 date "2020-11-01" @default.
- W3037310147 modified "2023-09-27" @default.
- W3037310147 title "Nanostructured octadecylsilica chemically coated stainless-steel fiber for vacuum-assisted HS-SPME sampling of PAHs in soil" @default.
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- W3037310147 doi "https://doi.org/10.1016/j.microc.2020.105201" @default.
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