Spectrophotometric determination of uranium in water samples after cloud point extraction using nonionic surfactant Triton X-114


Department of Chemistry, Faculty of Science, Islamic Azad University, Arak Branch, Arak, Iran


A cloud point extraction process using the nonionic surfactant Triton X-114 to extract
uranium from aqueous solutions was investigated. The method is based on the complexation
reaction of uranium with Arsenazo III and micelle-mediated extraction of the complex. The
optimal extraction and reaction conditions (e.g., pH, reagent concentration, effect of time) were
studied, and the analytical characteristics of the method (e.g., limit of detection, linear range)
were obtained. Linearity was obeyed in the range of 1.0-150.0 ng mL-1 of U(IV) ion. The
detection limit of the method was 0.3 ng mL-1 of uranium ion. The interference effect of some
anions and cations was also tested. The method was applied to the determination of uranium in
water samples.


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