Determination of uranium in phosphoric acid using 4-(2-pyridylazo)-resorcinol and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol reagents
- 1 January 1985
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 110 (10) , 1249-1252
- https://doi.org/10.1039/an9851001249
Abstract
An extraction-spectrophotometric procedure for the determination of uranium in phosphoric acid is described. It is based on the extraction of uranium with trioctylphosphine oxide in cyclohexane and subsequent reaction with 4-(2-pyridylazo)resorcinol or 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol, both of which are highly sensitive reagents that produce stable complexes. The determination of uranium in different stages of its extraction from wet-process phosphoric acid and in phosphate rocks, gypsum and water has been successfully carried out using the described procedures and reagents.Keywords
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