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- E-ISSN 2288-8985
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- P-ISSN1225-0163
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Study on Dc Polarograms of Some Rare Earth Elements
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2003, v.16 no.3, pp.206-211
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(2003). Study on Dc Polarograms of Some Rare Earth Elements. Analytical Science and Technology, 16(3), 206-211.
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Abstract
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 <TEX>$(C_2H_5)_4NCl$</TEX> 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 <TEX>$Eu^{3+}$</TEX>-EDTA and <TEX>$Eu^{3+}$</TEX>-DTPA are evaluated.
- keywords
- DC polarogram, some rare earth elements, DTPA
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