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Nanostructured octadecylsilica chemically coated stainless-steel fiber for vacuum-assisted HS-SPME sampling of PAHs in soil
Citation
Akbari, E and Ghiasvand, A and Dalvand, K, Nanostructured octadecylsilica chemically coated stainless-steel fiber for vacuum-assisted HS-SPME sampling of PAHs in soil, Microchemical Journal, 158 Article 105201. ISSN 0026-265X (2020) [Refereed Article]
Copyright Statement
© 2020 Elsevier B.V. All rights reserved.
DOI: doi:10.1016/j.microc.2020.105201
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.
Item Details
Item Type: | Refereed Article |
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Keywords: | nanostructured octadecylsilica, VA-HS-SPME, Sol-gel, stainless-steel, PAHs |
Research Division: | Chemical Sciences |
Research Group: | Analytical chemistry |
Research Field: | Separation science |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the chemical sciences |
UTAS Author: | Ghiasvand, A (Professor Alireza Ghiasvand) |
ID Code: | 139719 |
Year Published: | 2020 |
Web of Science® Times Cited: | 5 |
Deposited By: | Chemistry |
Deposited On: | 2020-06-29 |
Last Modified: | 2022-08-23 |
Downloads: | 0 |
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