eCite Digital Repository

Nanostructured octadecylsilica chemically coated stainless-steel fiber for vacuum-assisted HS-SPME sampling of PAHs in soil


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


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
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

Repository Staff Only: item control page