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

Subject Areas : Journal of the Iranian Chemical Research

Ali Niazi ¹ , Ahmad Akrami ² , Elham Sinka Karimi ³ , Fatemeh Bagheban Shahri ⁴

1 - Department of Chemistry, Faculty of Science, Islamic Azad University, Arak Branch, Arak, Iran
2 - Department of Chemistry, Faculty of Science, Islamic Azad University, Arak Branch, Arak, Iran
3 - Department of Chemistry, Faculty of Science, Islamic Azad University, Arak Branch, Arak, Iran
4 - Department of Chemistry, Faculty of Science, Islamic Azad University, Arak Branch, Arak, Iran

Received: 2011-04-04 Accepted : 2011-07-10 Published : 2011-03-20

Keywords: Cloud point extraction, Triton X-114, Determination, Spectrophotometric, Uranium,

Abstract :

A cloud point extraction process using the nonionic surfactant Triton X-114 to extracturanium from aqueous solutions was investigated. The method is based on the complexationreaction of uranium with Arsenazo III and micelle-mediated extraction of the complex. Theoptimal extraction and reaction conditions (e.g., pH, reagent concentration, effect of time) werestudied, 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. Thedetection limit of the method was 0.3 ng mL-1 of uranium ion. The interference effect of someanions and cations was also tested. The method was applied to the determination of uranium inwater samples.

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