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Comprehensive two-dimensional gas chromatography for the analysis and fast screening of polycyclic aromatic hydrocarbons in sediments

AuthorsPena-Abaurrea, M.; Blasco, Julián ; Ramos, Lourdes
Issue DateMay-2012
Citation36th International Symposium on Capillary Chromatography
9th GCxGC symposium
AbstractThis study evaluates the feasibility of comprehensive two-dimensional gas chromatography- time-of-flight mass spectrometry (GC×GC–ToF MS) for the determination of the 15+1 priority EU polycyclic aromatic hydrocarbons (PAHs) in sediments from the Sancti-Petri Channel (Cadiz Bay, Spain). The study area is a tidal channel of about 18 km, which connects the southern part of the Bay of Cádiz with the Atlantic Ocean. This protected natural enclave is potentially affected by different human and industrial activities. Firstly, standard solutions were used to optimise the separation by GC×GC–ToF MS of the investigated PAHs. Special attention was paid to critical PAH groups usually affected by chromatographic co-elution. The performance of the proposed methodology for the determination of the target compounds in real-life samples was evaluated by the analysis of sediment extracts prepared using a previously optimised microwave-assisted extraction-based method followed by solid-phase extraction purification. The developed methodology was then applied to the analysis of the 16 test PAHs in 17 sediments sampled along the 18-Km channel. The influence of the different industrial and human activities developed in the study area became evident though both, the detected PAH levels, and the divergent profiles observed for the compounds in the analysed sediments. Regarding this last aspect, the feasibility of a visualisation approach based on the use of size-normalised bubbles for the fast screening of PAH occurrence and the tentative identification of the potential major pollution sources was evaluated.
DescriptionTrabajo presentado en el 36th International Symposium on Capillary Chromatography (ISCC), celebrado en Riva del Garda (Italia) del 27 de mayo al 1 de junio de 2012.
Appears in Collections:(ICMAN) Comunicaciones congresos
(IQOG) Comunicaciones congresos
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