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Spectrophotometric Determination of Zirconium in Monazite Sand
Author(s) -
Lee ChiSo,
Chang FuChung,
Yeh YuChai
Publication year - 1982
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.198200013
Subject(s) - zirconium , chemistry , monazite , molar absorptivity , absorbance , nuclear chemistry , metal ions in aqueous solution , stability constants of complexes , analytical chemistry (journal) , inorganic chemistry , metal , ion , chromatography , paleontology , physics , organic chemistry , optics , biology , zircon
A sensitive spectrophotometric method was developed for the determination of zirconium in monazite sand. The zirconium ion was previously separated from the other interfering elements by a 0.5 M thenoyltrifluoroacetone (TTA)‐xylene extraction, then determined with Arsenazo III in 9 M HCl medium. Zirconium reacted with Arsenazo III to form an emeraled green coloured complex having maximum absorbance at 665 nm in 9 M HCl medium. The color was stable for at least 2 hours . Effects of time, HCl concentration, gelatine and various ions have been studied. The system confirms the Beer's law over the concentration range investigated. Optimum condition range for measurement in 1.0 cm quartz cell is 0.1–0.5 μg/ml of zirconium. The molar absorptivity is 1.51×10 5 liter mole −1 cm −1 . The metal‐ligand ratio of 1:4 was confirmed by Job's Continuous Variation method and the conditional stability constant of Zirconium‐Arsenazo III Complex in 4 M HCl and 9 M HCl were also determined by this method.