SRM 1649a - Urban Dust
Standard Reference Material (SRM) 1649a is an atmospheric particulate material collected in an urban area and is intended for use in evaluating analytical methods for the determination of selected polycyclic aromatic hydrocarbons (PAHs), nitro-substituted polycyclic aromatic hydrocarbons (nitro-PAHs), polychlorinated biphenyl (PCB) congeners, chlorinated pesticides, and total carbon in atmospheric particulate material and similar matrices. Reference and information values are also provided for selected polychlorinated dibenzo-p-dioxin and dibenzofuran
congeners, inorganic constituents, total extractable material, particle-size characteristics, and chemical and isotopic (14C) carbon composition. All of the constituents for which certified, reference, and information values are provided in SRM 1649a are naturally present in the particulate material. SRM 1649a is the same particulate material that was issued previously in 1982 as SRM 1649 ; this material has been rebottled and reanalyzed to provide updated certified values as well as certified, reference, and information values for additional constituents.
keywords: environmental material , particulate matter , trace elements , heavy metals