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Design and optimization of the VA-TV-SPME method for ultrasensitive determination of the PAHs in polluted water

Citation

Beiranvand, M and Ghiasvand, A, Design and optimization of the VA-TV-SPME method for ultrasensitive determination of the PAHs in polluted water, Talanta, 212 Article 120809. ISSN 0039-9140 (2020) [Refereed Article]

Copyright Statement

2020 Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.talanta.2020.120809

Abstract

This paper describes how a novel and reliable alternative approach was developed for conventional solid-phase microextraction (SPME) sampling by total-vaporization of a sample under vacuum conditions. SPME sampling consists two stages of the equilibrium process, which take place between the sample/headspace and the headspace/fiber coating. In the total-vaporization SPME (TV-SPME) strategy, the first stage is omitted and analytes are directly partitioned between the headspace and fiber coating. In this research, the TV-SPME strategy was implemented by the extraction of PAHs from aqueous media, using a polydimethylsiloxane (PDMS) coated SPME fiber. The most important variables were investigated and optimized. Optimal conditions were obtained at an extraction temperature of 55C, a vaporization time of 25min, and a sample volume of 100μL. To achieve higher sensitivities in shorter times, the TV-SPME setup was coupled with the VA-SPME system, which resulted in a much lower extraction temperature and time, in comparison with the conventional TV-SPME method. Under optimal experimental conditions, the calibration curves were linear across the area of 0.0152μgmL−1(R2>0.996). The limits of detection (LODs) were obtained in the range of 0.35ngmL−1, and the relative standard deviations (RSDs, n=6) were 6.17.5%. The developed vacuum-assisted total-vaporization SPME (VA-TV-SPME) technique, was coupled with GC-FID and successfully utilized for the determination of polycyclic aromatic hydrocarbons (PAHs) in river water samples. The data obtained was statistically in accordance with that achieved employing a validated approved method.

Item Details

Item Type:Refereed Article
Keywords:vacuum-assisted total-vaporization solid phase microextraction, VA-TV-SPME, GC-FID, polluted water, PAHs
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Analytical spectrometry
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:137432
Year Published:2020
Web of Science® Times Cited:8
Deposited By:Chemistry
Deposited On:2020-02-13
Last Modified:2020-04-30
Downloads:0

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