caa a22 4500 465745997 CHVBK 20180323111820.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00331416 doi (NATIONALLICENCE)springer-10.1007/BF00331416 Development of a definitive method for iodine speciation in aquatic systems [Elektronische Daten] [Christiane Reifenhäuser, Klaus Heumann] Summary: A definitive method of isotope dilution mass spectrometry (IDMS) was developed to determine four different iodine species in aquatic systems (iodide, iodate and two organoiodine compounds: one of the organic species is chromatographically elutable from a column filled with an anion exchanger resin, the other one is not). The iodine species were analysed after the isotope dilution step with an enriched 129I spike and after their chromatographic separation. The total iodine concentration was measured after decomposition of organic compounds in the aquatic system by UV irradiation. Different types of natural water samples (river water, water of a pond, moorland lake water) were analysed and important water parameters like pH-value, redox potential, oxygen content and dissolved organic carbon were measured for each of these samples. The total iodine concentration in the different samples differed only slightly in the range of 2-7 μg/l. In most of the moorland lake water samples only the two organoiodine species could be detected. In these samples the concentration of iodide and iodate was less than the detection limit of 0.5 μg/l and 0.1 μg/l, respectively. On the other hand, all four iodine species could be determined in most of the river water samples. Positive correlations were found for the oxygen content of the water samples and the iodate concentration as well as for the redox potential and the anionic organoiodine compound. Springer-Verlag, 1990 Reifenhäuser Christiane Institut für Anorganische Chemie der Universität Regensburg, Universitätsstrasse 31, D-8400, Regensburg, Germany aut Heumann Klaus Institut für Anorganische Chemie der Universität Regensburg, Universitätsstrasse 31, D-8400, Regensburg, Germany aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/7(1990-01-01), 559-563 0937-0633 336:7<559 1990 336 216 https://doi.org/10.1007/BF00331416 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00331416 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Reifenhäuser Christiane Institut für Anorganische Chemie der Universität Regensburg, Universitätsstrasse 31, D-8400, Regensburg, Germany aut NATIONALLICENCE 700 1- Heumann Klaus Institut für Anorganische Chemie der Universität Regensburg, Universitätsstrasse 31, D-8400, Regensburg, Germany aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/7(1990-01-01), 559-563 0937-0633 336:7<559 1990 336 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer