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Fujii, Toshiyuki*; Egusa, Soichiro*; Uehara, Akihiro*; Yamana, Hajimu*; Morita, Yasuji
Journal of Radioanalytical and Nuclear Chemistry, 295(3), p.2059 - 2062, 2013/03
Times Cited Count:3 Percentile:18.63(Chemistry, Analytical)Quantitative analysis of Nd, U, or Pd in 3 mol dm (M) HNO was performed by reflection absorption spectrophotometry at ultraviolet-visible-near-infrared (UV/Vis/NIR) region. A sample chamber with optics for reflection measurement was designed and attached to a UV/Vis/NIR spectrophotometer by optical fibers. The reflection absorbance showed linear relations with concentrations of Nd, U, and Pd at the absorbance region less than 0.1. The quantitative analysis was found to be possible for 3 M HNO solutions containing [Nd] ca. 0.2 M, [U] ca. 0.04 M, or [Pd] ca. 0.01 M at maximum.
Fujii, Toshiyuki*; Egusa, Soichiro*; Uehara, Akihiro*; Kirishima, Akira*; Yamagishi, Isao; Morita, Yasuji; Yamana, Hajimu*
Journal of Radioanalytical and Nuclear Chemistry, 290(2), p.475 - 478, 2011/11
Times Cited Count:21 Percentile:80.18(Chemistry, Analytical)Palladium complexation in concentrated nitric acid solutions was studied by UV/Vis absorption spectrophotometry. The ionic strength of the solutions was fixed to = 1, 3, or 5 M by mixing of HNO and HClO. The major palladium species were found to be Pd, PdNO, and Pd(NO). The formation constant of PdNO was determined to be = 1.32 ( = 1 M), 1.49 ( = 3 M), or 1.47 ( = 5 M), while that of Pd(NO) to be = 0.45 ( = 3 M) or 0.14 ( = 5 M).