caa a22 4500 465748244 CHVBK 20180323111826.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00323410 doi (NATIONALLICENCE)springer-10.1007/BF00323410 Flow injection spectrophotometric determination of calcium in rain and snow with chlorophosphonazo III [Elektronische Daten] [Michio Zenki, Kikuko Ohmuro, Kyoji Tôei] Summary: A spectrophotometric flow injection technique for the determination of calcium based on its color reaction with chlorophosphonazo III(CPA-III) is described. The complex formation of CPA-III with calcium ions was carried out in the presence of 0.01 mol/l oxalate at pH 2.8. Most of the common foreign ions did not interfere. Only strontium, barium and rare earth metals interfered. Under the optimum conditions, the calibration curve was linear up to 1.2 ppm calcium and the detection limit was 0.01 ppm for a sample volume of 120 μl. The relative standard variations for 0.4 and 1.0 ppm calcium were 0.354 and 0.352%, respectively. The method was successfully applied to the determination of calcium in rain and snow. Springer-Verlag, 1990 Zenki Michio Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1, Ridai-cho, 700, Okayama, Japan aut Ohmuro Kikuko Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1, Ridai-cho, 700, Okayama, Japan aut Tôei Kyoji Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1, Ridai-cho, 700, Okayama, Japan aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/6(1990-01-01), 707-709 0937-0633 338:6<707 1990 338 216 https://doi.org/10.1007/BF00323410 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00323410 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zenki Michio Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1, Ridai-cho, 700, Okayama, Japan aut NATIONALLICENCE 700 1- Ohmuro Kikuko Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1, Ridai-cho, 700, Okayama, Japan aut NATIONALLICENCE 700 1- Tôei Kyoji Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1, Ridai-cho, 700, Okayama, Japan aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/6(1990-01-01), 707-709 0937-0633 338:6<707 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer