larg volume preconcentration of dissolved hydrocarbons and polychlorinated biphenyls from seawater. Intercomparison between C_18 disks and XAD-2 column

摘要

The extraction efficiency of XAD-2 and 90 mm C_18 Empore disk for trace level determination (ng/L) of organic pollutants (i.e. hydrocarbons, chlorinated compounds) has been evaluated. Whereas C-18 Empore extraction disk exhibited higher extraction efficiency for aliphatic hydrocarbons from spiked Milli Q water and seawater, Amerlite XAD-2 column was more efficient for the extraction of individual PCB congeners and most of parent PAHs from spiked Milli Q water. However, in case of seawater analysis, the C_18 disk exhibited a higher extraction efficiency for the 3-4 aromatic ring PAH.