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Fabrication and evaluation of a portable low-pressure headspace solid-phase microextraction device for on-site analysis

Derikvand, A, Ghiasvand, A ORCID: 0000-0002-4570-7988, Dalvand, K and Haddad, PR ORCID: 0000-0001-9579-7363 2021 , 'Fabrication and evaluation of a portable low-pressure headspace solid-phase microextraction device for on-site analysis' , Microchemical Journal, vol. 168 , pp. 1-10 , doi: 10.1016/j.microc.2021.106362.

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A compact, simple, and reliable low-pressure headspace solid-phase microextraction (LP-HS-SPME) device was fabricated, optimized, and successfully evaluated for on-site sampling of volatile and semivolatile environmental organic pollutants. The efficacy of low-pressure extraction for fast and accurate analysis of complex samples has been substantiated already, but the developed systems are laborious and usually use typical vacuum pumps which make them non-portable. Additionally, they are not suitable for direct sampling of analytes from solid samples. This LP-HS-SPME setup is pocket-sized and operator friendly and uses a syringe for the evacuation. It is very effective for the direct sampling of volatile and semivolatile analytes in complex liquid and solid matrices. A new electrospun nano-octadecylsilica/polyvinyl alcohol (NODS/PVA) coated fiber was prepared and characterized by SEM, EDX, and FT-IR techniques. The fiber was utilized with the developed device for the extraction and determination of PAHs in solid samples, by coupling with gas chromatography-flame ionization detection (GC-FID). A response surface methodology based on a central composite design was used to optimize the important experimental variables. The method calibration graphs were linear in the range of 0.01–1300 ng g−1 and the detection limits were 3 to 50 pg g−1. The repeatability for a single-fiber and inter-fiber reproducibility were obtained 5.3–9.9% and 12.2–18.5%, respectively. The NODS/PVA coated fiber and the LP-HS-SPME-GC-FID method were successfully assessed for the direct sampling and analysis of PAHs in polluted soil samples.

Item Type: Article
Authors/Creators:Derikvand, A and Ghiasvand, A and Dalvand, K and Haddad, PR
Keywords: portable low-pressure SPME, nano-octadecylsilica/polyvinyl alcohol, PAHs, solid samples
Journal or Publication Title: Microchemical Journal
Publisher: Elsevier Inc
ISSN: 0026-265X
DOI / ID Number: 10.1016/j.microc.2021.106362
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© 2021 Elsevier B.V. All rights reserved.

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