Premium
Spectrophotometric Study of Cerium(III) and Thorium(IV) Chelates of trans ‐I, 2‐diaminocyclohexane‐N, N, N′, N′‐ Tetraacetic Acid (DCTA)
Author(s) -
Hseu TongMing,
Young ChungChang
Publication year - 1965
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.196500007
Subject(s) - chemistry , chelation , cerium , ionic strength , aqueous solution , inorganic chemistry , absorption (acoustics) , ion , nuclear chemistry , thorium , organic chemistry , physics , acoustics , materials science , uranium , metallurgy
Interaction between DCTA and Ce(III) ion has been investigated spectrophotometrically. It has been found that the Ce(III)‐DCTA chelate in aqueous solution ( p H 4.25) exhibited a characteristic absorption maximum at 305 m μ. The absorption of Ce(III)‐DCTA chelate is considerably diminished by the addition of small amounts of Th(IV) ion. This phenomenon is used as the basis of a simple spectrophotometric scheme for the quantitative determination of Th(IV) ion and the evaluation of the formation constant of Th(IV)‐DCTA chelate. The composition of Ce(III)‐ and Th(IV)‐DCTA chelates were 1:1 and the corresponding formation constants (log K f ) of the chelates were 16.87 and 23.76 at 25°C and an ionic strength of 0.1 (KNO 3 ), respectively. The application of this system to the determination of traces of Th(IV) ion has been demonstrated.