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The purpose of this study was to establish national standard method of polycyclic aromatic hydrocarbons (PAHs) in sediment. The samples were extracted using Soxhlet extraction or accelerated solvent extraction (ASE) and injected with benzo[e]pyrene-d12 as a surrogate internal standard. Napthalene-d8, acenaphthene-d10, phenanthrene-d10, chrysene-d12, Benzo(a)pyrene-d12, Indeno(1,2,3-c,d)pyrene-d12 were used as internal cleanup standards. P-terphenyl-d14 was injected as a recovery internal standard and analyzed using gas chromatograph-mass spectrometer (GC-MS). An interlaboratory comparison study was conducted, in which the three selected participating laboratories quantitatively analyzed several PAHs in certified sediment samples: IAEA-383, IAEA-417, IAEA-408, NIST-1944. Internal quality control was conducted individually. The results reported for PAHs by the three laboratories were acceptable, with a range of relative standard deviations (RSD) of 4.0-24.0% in IAEA-383(16.0 ng/g-290.0 ng/g). Results obtained for the IAEA-417 (150.0 ng/g-7,700.0 ng/g) and NIST-1944 samples (390.0 ng/g-9,700.0 ng/g) were also found acceptable with a range of RSD of 5.4-27.9% and 2.4-25.3%, respectively. Although the results of IAEA-408(3.3 ng/g-84.0 ng/g) were slightly higher than those of other RSDs, they were acceptable with a ranged of 2.5-38.7% at two of the laboratories. The limit of quantification of this method was found to be 0.003 mg/kg, and recovery rates ranged from 50.0% to 120.0%. The RSD was less than 25%, and the accuracy ranged from 60.0% to 135.0% in sediment.

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