Optimisation and application of accelerated solvent extraction and flash chromatography for quantification of PCBs in tree barks and XAD-2 passive samplers using GC-ECD with dual columns

► Extraction of XAD-2 passive samplers and tree barks by Accelerated solvent Extraction. ► Field calibration of XAD-2 passive samplers. ► Analysis by GC-ECD with dual columns. ► Application of the method for quantifying PCBs in tree barks with accuracy.