Journal
ANALYTICA CHIMICA ACTA
Volume 900, Issue -, Pages 56-66Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2015.10.016
Keywords
Cooling/heating-assisted solid-phase microextraction; Polycyclic aromatic hydrocarbons; Contaminated soil
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A simple, low-cost, and effective cooling/heating-assisted headspace solid-phase microextraction (CHA-HS-SPME) device, capable of direct cooling the fiber to low temperatures and simultaneous heating the sample matrix to high temperatures, was fabricated and evaluated. It was able to cool down the commercial and handmade fibers for the effective tapping of volatile and semi-volatile species in the headspace of complex solid matrices, with minimal manipulation compared with conventional SPME. The CHA-HS-SPME system can create large temperature gaps (up to 200 degrees C) between the fiber and the sample matrix, because the cooling process is directly applied onto the fiber. Different effective experimental parameters for the fabrication of the CHA-HS-SPME device as well as for the extraction and determination of polycyclic aromatic hydrocarbons (PAHs) from solid samples were evaluated and optimized. The proposed device coupled to GC-FID was successfully applied for the extraction and determination of PAHs in contaminated soils without any sample pretreatment step. Good agreement was observed between the results obtained by the proposed CHA-HS-SPME-GC-FID method and those achieved by validated method. (C) 2015 Elsevier B.V. All rights reserved.
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