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Spectrophotometric Studies on Ferron and Thorium (IV)‐Ferron Chelate
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AbstractThe ionization constants of ferron (7‐iodo‐8‐hydroxyquinoline‐5‐sulphonic acid) and the interaction between Th(IV) and ferron have been studied spectrophotometrically at 25° and ionic strength of 0.1. The ionization constants were found to be pK1=2.41±0.01, pK2=7.10±0.01. The Th(IV)‐ferron chelate in aqueous solution of pH 5.0 exhibited a characteristic absorption maximum at 365 mμ. The composition of Th(IV)‐ferron chelate was 1:4 mole ratio of Th(IV) ion and ferron, and the stability constant (log Kg) was 26.22±0.16.
Title: Spectrophotometric Studies on Ferron and Thorium (IV)‐Ferron Chelate
Description:
AbstractThe ionization constants of ferron (7‐iodo‐8‐hydroxyquinoline‐5‐sulphonic acid) and the interaction between Th(IV) and ferron have been studied spectrophotometrically at 25° and ionic strength of 0.
1.
The ionization constants were found to be pK1=2.
41±0.
01, pK2=7.
10±0.
01.
The Th(IV)‐ferron chelate in aqueous solution of pH 5.
0 exhibited a characteristic absorption maximum at 365 mμ.
The composition of Th(IV)‐ferron chelate was 1:4 mole ratio of Th(IV) ion and ferron, and the stability constant (log Kg) was 26.
22±0.
16.
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