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

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

建立了用加速溶剂萃取技术提取含硫沉积物中痕量多环芳烃的可靠方法，优化了不同萃取剂，不同提取程序等萃取条件，研究了沉积物中的硫化物对色谱分离的影响。15种多环芳烃的检出限为0．09～1．34ng／g，相对标准偏差（RSD，n=6）为12．5％～23．9％，15种多环芳烃的低浓度加标回收在74％-138％之间。高浓度加标回收率除吲哚芘为62％外，其余都在80％～122％之间。基本上达到了痕量分析的要求。用该方法分析山东半岛近岸海域沉积物中多环芳烃的含量，测得15种PAHs的总量为273～579ng／g。与其它地区沉积物中多环芳烃含量相比，属轻／中度污染。

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.