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Polarography of Uranium Chelate with 2,3‐Cresotic Acid
Author(s) -
Chen S.N.,
Chen T.H.,
Gi H.C.,
Wang J.J.
Publication year - 1988
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.198800061
Subject(s) - chemistry , uranyl , polarography , chelation , uranium , ligand (biochemistry) , titration , metal , metal ions in aqueous solution , inorganic chemistry , ion , nuclear chemistry , organic chemistry , biochemistry , materials science , receptor , metallurgy
The polarography of uranyl ion in 2,3‐cresotic acid solution has been studied at 25°C under varying conditions of ligand concentration and pH. The ligands species were proved to be a 2,3‐cresotate anion. The half‐wave potential vs. pH value interpreted on the basis of pK value for the acid ionization, and resulted in agreement with the deduction. The mole ratio of metal to ligand was found to be 1:1 and 1:2 by conductometric titration. At pH < pK 1 , the complex species of UO 2 (H 2 A) 2+ and UO 2 (HA) + was identified. At pK 1 < pH < pK 2 , the co‐existence of UO 2 (HA) + , UO 2 (OH)(HA) 2 − and UO 2 (A) 2 2– was confirmed. At pH > pK 2 , the complex species of UO 2 (OH) (A) 2 3– was formed.