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Cathodic Action of the Uranium Chelate Compounds at the Dropping Mercury Electrode. II. Uranyl‐Glutamate Complex
Author(s) -
Lai TsaiTeh,
Chang TehLiang,
Chang Hua
Publication year - 1961
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.196100003
Subject(s) - chemistry , uranyl , polarography , diffusion current , chelation , dropping mercury electrode , uranium , inorganic chemistry , diffusion , mercury (programming language) , electrode , analytical chemistry (journal) , electrochemistry , ion , current (fluid) , metallurgy , thermodynamics , organic chemistry , physics , materials science , computer science , programming language
The polarographic behavior of a tridentate chelate compound of uranyl‐glutamate has been investigated over the p H range of 1.5 to 5.5. The first wave of one‐electron reduction and diffusion‐controlled reversible wave was applied through this p H. range. Below p H 1.9 there was no chelation, and above p H 5.5 turbidity ensued. At p H 3.0 to 3.9 the diffusion current was independent of p H value and the diffusion current constant was calculated to be 2.08. The proportionality between uranyl ion concentration and diffusion current held within the narrow range of 2.2 × 10 −4 M to 3.3×10 −3 M with 1.9% average deviation of the mean. The chelate forms and electrode reactions identified from the half‐wave potential and diffusion current data were:\documentclass{article}\pagestyle{empty}\begin{document}$ \begin{array}{*{20}c} {p{\rm H}} \hfill & {4.4 - 5.5,} \hfill & {{\rm UO}_2 \left({\rm G} \right)_2 = + e = {\rm UO}_2 ^ + + 2{\rm G}^ =} \hfill \\ {p{\rm H}} \hfill & {3.0 - 4.4,} \hfill & {{\rm UO}_2 \left({{\rm HG}} \right)_2 + {\rm H}^ + + e = {\rm UO}_2 \left({{\rm HG}} \right) + {\rm H}_2 {\rm G}} \hfill \\ {p{\rm H}} \hfill & {< 1.9,} \hfill & {{\rm UO}_2 ^{+ +} + e = {\rm UO}_2 +} \hfill \\\end{array} $\end{document}