Radiopolarographic determination of the stability constant of 18-crown-6 complex for Ra2+

Y. Shiokawa, T. Kido, S. Suzuki

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14 Citations (Scopus)


The interaction of Ra2+, Sr2+ and Ba2+ with 1,4,7,10,13,16-hexaoxacyclooctadenace /18-crown-6/ in an aqueous solution was investigated by radio- and dc polarography. It was found that all these ions form 1:1 complexes with 18-crown-6 and their stability constants, lg K, are 3.43 for Ra2+, 2.40 for Sr2+ and 3.67 for Ba2+, respectively. The stability constant for Am2+ was estimated from the relationship between lg K for Sr2+, Ba2+, Ra2+, Eu2+, Yb2+ and Cf2+ and the ionic radii.

Original languageEnglish
Pages (from-to)249-255
Number of pages7
JournalJournal of Radioanalytical and Nuclear Chemistry Letters
Issue number3
Publication statusPublished - 1985 Nov 1

ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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