Studies on DC Polarograms of Some Rare Earth Elements

몇가지 희토류원소의 DC 폴라로그램에 관한 연구

  • Received : 2003.02.15
  • Accepted : 2003.04.09
  • Published : 2003.06.25


The DC polarograms of some rare earth elements have been investigated in various pH solution and electrolytes. Samarium ion has two well-defined reduction waves at -1.75 V and -1.95 V in 0.1 M NaCl solution and those are a diffusion controlled in nature. Europium and ytterbium ions give also two step reduction waves at -0.75 V and -1.95 V for europium and -1.45 V and -2.00 V for ytterium in $(C_2H_5)_4NCl$ solution. On the other hand, lantanium and neodium ions show a single reduction wave at -1.75 V. The differences of half wave potentials between europium, ytterium and samarium ions make it possible to determine each ions in the mixed solution sponteniously. In case of europium ion, the stability constants for the complexs of $Eu^{3+}$-EDTA and $Eu^{3+}$-DTPA are evaluated.


DC polarogram;some rare earth elements;DTPA


Supported by : 인하대학교


  1. Chemical Geology v.191 no.1 An experimental study of the dissolution stoichiometry and rates of a natural monazite as a function of temperature from 50 to 230 oC and pH from 1.5 to 10 H.O. Eric;P. Frank
  2. J. Electrochem. Soc. India, Communicated K.S. Pitre;V.K. Chitale
  3. Industrial & Engineering Chemistry Analytical Edition v.13 no.11 H.H. Laitinen;W.A. Taebel
  4. Journal of the Chemical Society A Inorganic Physical Theoretical J.B. Headridge;D.Pletcher;M.Callingham
  5. Inorganic Chemistry v.2 no.1 J. F. Coetzee;W.S. Siao
  6. Journal of the American Chemical Society v.70 no.4 C.R. Estee;G. Glokler
  7. Z. Electrochem. v.45 L. Holleck
  8. Journal of the American Chemical Society v.70 no.4 A. Timnick;G. Glockler
  9. Bull. Korean Chem. Soc. v.21 no.5 K.W. Cha;C.I. Park
  10. Quantitative Chemical Analysis, (4th Ed.) I.M. Kolthoff;E.B. Sandell;E.J. Meehan
  11. Talanta v.40 no.10 A reversible optode membrane for picric acid based on the fluorescence quenching of pyrene H.H. Zeng
  12. Journal of the American Chemical Society v.79 no.8 I.M. Kolthoff;J.K. Coetzee
  13. Analytica Chimica Acta v.476 no.1 Solid phase extraction for analysis of biogenic carbonates by electrothermal vaporization inductively coupled plasma mass spectrometry (ETV-ICP-MS): an investigation of rare earth element signatures i T.P. Rao;V.M. Biju
  14. Analytical Chemistry v.30 no.2 A. Zikri;J.P. Anthong
  15. Anal. Sci. & Tec. v.10 no.6 K.W. Cha;K.W. Park
  16. Angewandte Chemie v.50 no.20 W. Noddack;A. Bruck
  17. J. Chem. Educ. v.47 T. Moeller
  18. Journal of the American Chemical Society v.79 no.8 I.M. Kolthoff;J.K. Coetzee