title: Comparison of the behavior of 13C- and deuterium-labeled polycyclic aromatic hydrocarbons in analyses by isotope dilution mass spectrometry in combination with pressurized liquid extraction.
abstract: We examined the differences found in the concentrations of polycyclic aromatic hydrocarbons (PAHs) in sediment samples when determined by isotope dilution mass spectrometry (IDMS) using 13C-labeled PAHs (13C-PAHs) and deuterium-labeled PAHs (PAHs-d) as internal standards. The samples were analyzed by pressurized liquid extraction (PLE) in combination with gas chromatography-mass spectrometry. The observed concentrations with PAHs-d as internal standards were significantly (p<0.05) lower (1.9-4.3%) than those determined with 13C-PAHs. The most important factor responsible for the high recovery of PAHs-d relative to 13C-PAHs and native PAHs is the higher stability of PAHs-d during the PLE process.
authors.affiliation: National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1, Umezono, Tsukuba, Ibaraki 305-8563, Japan. nobuyasu-itoh@aist.go.jp
authors.forename: Nobuyasu
authors.initials: N
authors.lastname: Itoh
authors.forename: Masahiko
authors.initials: M
authors.lastname: Numata
authors.forename: Yoshie
authors.initials: Y
authors.lastname: Aoyagi
authors.forename: Takashi
authors.initials: T
authors.lastname: Yarita
mesh_terms: D002247:Carbon Isotopes / Q000737:chemistry*; D003903:Deuterium / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry* / Q000592:standards; D012015:Reference Standards; D015203:Reproducibility of Results
chemical_list: D002247:Carbon Isotopes; D011084:Polycyclic Aromatic Hydrocarbons; D003903:Deuterium