Polarography of Lanthanum(III), Praseodymium(III), and Ytterbium(III) in Anhydrous Ethylenediamine

Polarography of Lanthanum(III), Praseodymium(III), and Ytterbium(III) in Anhydrous Ethylenediamine

Problems in the polarography of aqueous systems are reviewed. Anhydrous Yb(III), La(III), and Pr(III) acetates in anhydrous ethylenediamine gave a double irreversible wave for Yb (--0.411, -0.747 volt) and single irreversible waves for La and Pr (-0.565, 0.571 volt). A zinc reference and tetrabutyla...

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Veröffentlicht in:Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed Anal. Ed, 1963-12, Vol.35 (13), p.2108-2112
Hauptverfasser: Hall, L. C, Flanigan, D. A
Format: Artikel
Sprache:eng
Schlagworte:
ACETATES
AMINES
AMMONIUM COMPOUNDS
BUTYL RADICALS
CHEMISTRY
COULOMETRY
ELECTRIC POTENTIAL
ELECTROLYTES
ELECTROLYTIC CELLS
LANTHANUM COMPOUNDS
MERCURY ALLOYS
OVERVOLTAGE
PERCHLORIC ACID
POLAROGRAPHY
PRASEODYMIUM COMPOUNDS
QUALITATIVE ANALYSIS
SOLUTIONS
WATER
YTTERBIUM COMPOUNDS
ZINC
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Zusammenfassung:Problems in the polarography of aqueous systems are reviewed. Anhydrous Yb(III), La(III), and Pr(III) acetates in anhydrous ethylenediamine gave a double irreversible wave for Yb (--0.411, -0.747 volt) and single irreversible waves for La and Pr (-0.565, 0.571 volt). A zinc reference and tetrabutylammonium perchlorate electroytde were used. Coulometry established 1- and 2-electron steps for Yb and 3 electrons for La and Pr. Metal amalgams were shown by chemical tests. Yb(II) gave no anodic waves, since a transfer rate of 1.15 x 10/ sup -9/ cm sec/sup -1/ at 0.0 volt caused anodic overvoltages beyond Hg. (auth)
ISSN:0003-2700
1520-6882
DOI:10.1021/ac60206a036