GC-MS Determination of 16 Polycyclic Aromatic Hydrocarbons in Water Sediment by Ultrasonic Extraction

Sixteen polycyclic aromatic hydrocarbons (PAH′s) were separated from water sediment by ultrasonic extraction with CH2Cl2, and the extract was purified and concentrated to about 0.5 mL. Rtx-5MS capillary column was used for separation. The identification of the 16 PAH′s was performed by comparing spectra obtained by MS detector with NIST05 atlas database; and quantification was performed by GC using external standard method with hydrogen flame ionization detector (FID). Values of detection limit (3S/N) of the method found were in the range of 0.27-6.0 μg·kg-1. Values of recovery found by the standard addition method, were ranged from 56% to 96% with RSD′s (n=5) ranged from 1.2% to 8.3%.