Vacuum-assisted headspace solid phase microextraction of polycyclic aromatic hydrocarbons in solid samples

Analytica Chimica Acta
Evangelia YiantziElefteria Psillakis

Abstract

For the first time, Vacuum Assisted Headspace Solid Phase Microextraction (Vac-HSSPME) is used for the recovery of polycyclic aromatic hydrocarbons (PAHs) from solid matrices. The procedure was investigated both theoretically and experimentally. According to the theory, reducing the total pressure increases the vapor flux of chemicals at the soil surface, and hence improves HSSPME extraction kinetics. Vac-HSSPME sampling could be further enhanced by adding water as a modifier and creating a slurry mixture. For these soil-water mixtures, reduced pressure conditions may increase the volatilization rates of compounds with a low K(H) present in the aqueous phase of the slurry mixture and result in a faster HSSPME extraction process. Nevertheless, analyte desorption from soil to water may become a rate-limiting step when significant depletion of the aqueous analyte concentration takes place during Vac-HSSPME. Sand samples spiked with PAHs were used as simple solid matrices and the effect of different experimental parameters was investigated (extraction temperature, modifiers and extraction time). Vac-HSSPME sampling of dry spiked sand samples provided the first experimental evidence of the positive combined effect of reduced pressur...Continue Reading

References

Jul 20, 2000·Journal of Chromatographic Science·J Pawliszyn
Nov 16, 2005·Analytical Chemistry·Gangfeng OuyangJanusz Pawliszyn
Nov 28, 2006·The Journal of Physical Chemistry. B·Constantinos D Zeinalipour-Yazdi, David P Pullman
May 25, 2012·Journal of Chromatography. a·Elefteria PsillakisNicolas Kalogerakis
Mar 12, 2013·Journal of Chromatography. a·Elefteria PsillakisNicolas Kalogerakis

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Citations

Oct 6, 2018·Journal of Separation Science·Adissu Alemayehu AsfawErwin Adams

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