Determination of PAHs in soil by accelerated solvent extraction-solid phase extraction-gas chromatographymass spectrometry

A metiiod for the simultaneous determination of 16 polycyclic aromatic hydrocarbons (PAHs) in soil by ASE-SPE-GC/MS was established. The soil samples were extracted by n-hexane-acetone, dehydrated by anhydrous sodium sulfate and concentrated by nitrogen blowing, purified by florisil column, detected by gas chromatography-mass spectrometry and quantified by internal standard metiiod. The results showed that the linearity of the metiiod was good in the range of 0.4-10 µg/mL, and the correlation coefficient (r2) was more than 0. 9962 witii the detection limit of 4.8-25 µg/kg and the quantitative limit of 19.2-100 µg/kg. The average recoveries at spiked levels of 0.05, 0.15 and 0.40 mg/kg ranged from 55.4% to 129.0% witii the relative standard deviations from 1.5% to 11%. In this metiiod, 13 PAHs were detected in the concentration range of 6.8-86 µg/kg in a soil sample except acenaphthene, acenaphthene and fluorene. © 2021, Youke Publishing Co.,Ltd. All rights reserved.