Cloud point extractive spectrophotometric method for determination of uranium in raffinate streams during spent nuclear fuel reprocessing
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A cloud point extractive spectrophotometric method was developed for the determination of uranium in raffinate streams. Uranium was extracted to a tri n-octyl phosphine oxide in o-Xylene from raffinate. Uranium present in organic phase was analyzed by spectrophotometry after cloud point extraction of U-PAR (4-(2-Pyridylazo) resorcinol) complex to cetyl trimethyl ammonium bromide—Triton-X-100 medium. The molar absorption coefficient for uranium complex was found to be 2.2 × 104 l mol−1 cm−1. The relative standard deviation for the determination of uranium was found to be 3.9% and with a minimum detection limit of 2 µg uranium per aliquot.
KeywordsUranium Cloud point extraction Spectrophotometry 4-(2-Pyridylazo) resorcinol (PAR)
The Authors are thankful to Dr A. Ravisankar, Director, Reprocessing Group, IGCAR for his constant encouragement throughout the work. The valuable contributions during experimental part from Mrs. V. Rekha, Mrs. G. Pritha and Mrs. V. Varalakshmi of Chemical Laboratory, Reprocessing Group are greatly acknowledged.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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