title: Certified reference material for quantification of polycyclic aromatic hydrocarbons and toxic elements in tunnel dust (NMIJ CRM 7308-a) from the National Metrology Institute of Japan.
abstract: The National Metrology Institute of Japan has issued a certified reference material of tunnel dust for polycyclic aromatic hydrocarbons (PAHs) and toxic element analyses. PAH certification was performed using isotope dilution mass spectrometry with deuterium-labeled PAHs as internal standards. Three extraction techniques (microwave-assisted extraction with toluene/methanol, Soxhlet extraction with toluene, and pressurized liquid extraction with toluene) were used, and the extracts were measured by gas chromatography/mass spectrometry with two different columns. For values of PAHs, 11 PAHs are provided as certified values between 0.294 and 20.3 mg/kg, and five PAHs are provided as information values. Certified values of five toxic elements (Cr, Ni, Pb, Mn, and Cd) obtained from microwave-assisted digestions and a combination of measurement techniques are also provided between 43.4 and 10.71 × 10(3) mg/kg.
authors.affiliation: National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan. nobuyasu-itoh@aist.go.jp
authors.forename: Nobuyasu
authors.initials: N
authors.lastname: Itoh
authors.forename: Kazumi
authors.initials: K
authors.lastname: Inagaki
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Narukawa
authors.forename: Yoshie
authors.initials: Y
authors.lastname: Aoyagi
authors.forename: Izumi
authors.initials: I
authors.lastname: Narushima
authors.forename: Masae
authors.initials: M
authors.lastname: Koguchi
authors.forename: Masahiko
authors.initials: M
authors.lastname: Numata