title: Determination of As in tree-rings of poplar (Populus alba L.) by U-shaped DC arc.
abstract: An argon-stabilized U-shaped DC arc with a system for aerosol introduction was used for determination of As in poplar (Populus alba L.) tree-rings. After optimization of the operating parameters and selection of the most appropriate signal integration time (30 s), the limit of detection for As was reduced to 15.0 ng/mL. This detection limit obtained with the optimal integration time was compared with those for other methods: inductively coupled plasma-atomic emission spectrometry (ICP-AES), direct coupled plasma-atomic emission spectrometry (DCP-AES), microwave induced plasma-atomic emission spectrometry (MIP-AES) and improved thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS). Arsenic is toxic trace element which can adversely affect plant, animal and human health. As an indicator of environment pollution we collected poplar tree-rings from two locations. The first area was close to the "Nikola Tesla" (TENT-A) power plant, Obrenovac, while the other was in the urban area of Novi Sad. In all cases elevated average concentrations of As were registered in poplar tree-rings from the Obrenovac location.
authors: Institute of Physics, P. O. Box 68, Pregrevica 118, 11080, Belgrade, Serbia. markovic@phy.bg.ac.yu
authors: D M
authors: DM
authors: Marković
authors: I
authors: I
authors: Novović
authors: D
authors: D
authors: Vilotić
authors: Lj
authors: Lj
authors: Ignjatović
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000818:Animals; D001151:Arsenic / Q000032:analysis; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods; D006801:Humans; D032107:Populus / Q000033:anatomy & histology / Q000737:chemistry; D055771:Serbia
chemical_list: D000393:Air Pollutants; D001151:Arsenic