A micro mixed micelle-mediated preconcentration procedure for spectrophotometric determination of uranium in real and synthetic samples

• Published in: Journal of radioanalytical and nuclear chemistry Vol. 313; no. 1; pp. 69 - 77
• Main Authors: Mortada, W. I., Kenawy, I. M. M., El-Gamal, G. G., Moalla, S. M. N.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01-07-2017; Springer; Springer Nature B.V
• Subjects: Calibration; Chemistry; Chemistry and Materials Science; Complex formation; Diagnostic Radiology; Enrichment; Extraction; Hadrons; Heavy Ions; Inorganic Chemistry; Matrices (mathematics); Nuclear Chemistry; Nuclear Physics; Physical Chemistry; Separation; Spectrophotometry; Surface active agents; Triton; Uranium; Preconcentration; Micro cloud point extraction; Uranium; Spectrophotometry; SPADNS
• ISSN: 0236-5731; 1588-2780
• DOI: 10.1007/s10967-017-5281-3

A micro-cloud point extraction method was discussed for preconcentration and spectrophotometric quantification of U(VI). The method depends on complex formation between U(VI) and 2-(4-sulphophenyloazo)-1,8-dihydroxy-3,6-naphtalenedisulphonic acid (SPADNS) at pH 7.0 and subsequent extraction of the complex in a mixed surfactant medium (cethyltrimethyl ammonium bromide and Triton X-114). The separation was carried out in the presence of 1% Na
2
SO
4
at room temperature. The calibration curve was linear up to 3000 µg L
−1
. The enrichment factor, detection limit and precision were 16.0, 1.05 µg L
−1
, and 2.3%, respectively. The method was employed for the determination of U(VI) in real samples with different matrices.