title: Evaluation of behavioral differences between native polycyclic aromatic hydrocarbons and (13)C-labeled internal standards during clean-up steps of analysis.
abstract: We confirmed that concentrations of polycyclic aromatic hydrocarbons (PAHs) obtained by isotope dilution mass spectrometry (IDMS) using the corresponding (13)C-labeled internal standards are reliable even after clean-up steps. Change in the ratio of phenanthrene to (13)C(6)-phenanthrene was less than 0.2%, although the recovery yield of (13)C(6)-phenanthrene decreased to 60%. Since changes in the ratios were commonly within the relative standard deviations of the concentrations (1.5 - 5.4%) obtained using gas chromatography-mass spectrometry in combination with pressurized-liquid extraction, concentrations obtained by IDMS with (13)C-PAHs should be reliable.
authors.affiliation: National Metrology Institute of Japan (NMIJ), 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: Takashi
authors.initials: T
authors.lastname: Yarita