海洋沉积物中多环芳烃标准物质均匀性检验的研究

technique for testing of homogeneities of standard reference materials (SRM) of polycyclic aromatic hydrocarbons (PAHs) in marine sediments had been established. The determination of SRM of 17 kinds of PAHs in marine sediments (under mesh 200) had been performed with ultrasonic wave extraction (UWE) and silica gel-alumina-swirl-centrifugal separation (SASCS) with elution of different extract solvents of hexane and dichloromethane by gas chromatography coupled with mass spectrometry-selected ion monitoring with capillary column. It was showed that the RSD of repeated relative response factors and relative retain time ranged from 1.03% to 9.70% and 0.009% to 0.046%, respectively. It was revealed that there was a good separation in the near PAHs each other. The limits of detection of 17 kinds of PAHs ranged from 1.0 pg to 10.0 pg. It indicated that there were the homogeneities of 17 kinds of PAHs in marine sediments (under mesh 200) in 18 times of sampled experiments because of which the value of statistical parameters of F were all less than the critical value of statistical parameters of Fα, and illuminated that it could be used for the SRM in marine environmental monitoring.