caa a22 4500 463218922 CHVBK 20180405153206.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1134/S1061934807090055 doi (NATIONALLICENCE)springer-10.1134/S1061934807090055 Spectrochemical determination of trace uranium by an argon-stabilized U-shaped DC arc [Elektronische Daten] [I. Novović, V. Nikolić, D. Marković] An argon-stabilized U-shaped DC arc with the system for aerosol introduction was used for uranium determination. High uranium toxicity suggests the necessity of developing as sensitive methods as possible for U detection in various natural samples and complex matrices. By optimizing the operation conditions of U-shaped arc plasma and by applying an appropriate computer program that performs temporal integration of recorded signals, the measurement precision as well as the concentration sensitivity were improved, and the detection limit was lowered. Uranium detection limit, obtained by the application of U-shaped arc plasma during different integration times, decreases by increasing integration time. By increasing this time from 1 to 30 s, the detection limit was 37 times lower and the lowest detection limit is 0.07 μg/mL. The detection limit achieved by this method is comparable with the detection limits obtained by such methods as inductively coupled plasma-atomic emission spectroscopy (ICP-AES), direct coupled plasma-atomic emission spectroscopy (DCP-AES), and microwave induced plasma-atomic emission spectroscopy (MIP-AES). Pleiades Publishing, Ltd., 2007 Novović I. Institute of Physics, Pregrevica 118, 11080, Belgrade, Serbia aut Nikolić V. Institute of General and Physical Chemistry, Studentski trg 12-16, 11001, Belgrade, Serbia aut Marković D. Institute of Physics, Pregrevica 118, 11080, Belgrade, Serbia aut Journal of Analytical Chemistry Nauka/Interperiodica 62/9(2007-09-01), 837-839 1061-9348 62:9<837 2007 62 10809 https://doi.org/10.1134/S1061934807090055 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807090055 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Novović I. Institute of Physics, Pregrevica 118, 11080, Belgrade, Serbia aut NATIONALLICENCE 700 1- Nikolić V. Institute of General and Physical Chemistry, Studentski trg 12-16, 11001, Belgrade, Serbia aut NATIONALLICENCE 700 1- Marković D. Institute of Physics, Pregrevica 118, 11080, Belgrade, Serbia aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/9(2007-09-01), 837-839 1061-9348 62:9<837 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer