加速溶剂萃取/气相色谱-质谱测定海洋沉积物中的痕量多环芳烃

沉积物是多环芳烃(polycyclic aromatic hydrocarbons,PAHs)在环境中迁移归趋的一个重要的汇[1]。沉积物中多环芳烃的提取方法主要有索氏提取、超声波提取、微波萃取、加速溶剂提取及超临界流体萃取等。其中加速溶剂提取(accelerated solvent extraction,ASE)由于提取速度快,溶

The Determination of Polycyclic Aromatic Hydrocarbons in Sediments with ASE/GC-MS

An accelerated solvent extraction method for the extraction of polycyclic aromatic hydrocarbons(PAHs) in sediments was developed.The extraction conditions such as extraction solvent and program were optimized.The effects of sulfide on chromatographic separation were studied.The detection limits for the fifteen PAHs were 0.09-1.34 ng/g,and the relative standard deviations(RSDs) ranged from 12.5% to 23.9%.The recoveries of high level concentration ranged from 62% to 122% and those of low level concentration ranged from 74%-138%.The contents of PAHs in sediment samples collected in the coastal regions off the Shandong peninsula,China were analyzed by this method.The PAHs in these samples ranged from 273 ng/g to 579 ng/g.Overall,the PAHs levels were comparable to those reported in the literature for sediment samples collected from similar environments around the world.