Cloud Point Extraction and Spectrophotometric Determination of Uranium VI in Water Samples after Mixed Micelle-Mediated Extraction Using Chromotrope 2R as Complexing AgentReport as inadecuate




Cloud Point Extraction and Spectrophotometric Determination of Uranium VI in Water Samples after Mixed Micelle-Mediated Extraction Using Chromotrope 2R as Complexing Agent - Download this document for free, or read online. Document in PDF available to download.

Croatica Chemica Acta, Vol.85 No.3 October 2012. -

A rapid, selective and sensitive method for the preconcentration and determination of uranium VI by cloud point extraction CPE was developed. The method was based on the color reaction of 5.00 ng mL−1 uranium VI with 1.5×10−4 mol L−1 of chromotrope 2R in the presence of 0.015 mol L−1 potassi-um iodide at pH 8 in HEPES buffer and mixed micelle-mediated extraction of complex. The mixture of a nonionic surfactant 0.2 % v-v of Triton X-114 and a cationic 2.0×10−4 mol L−1 of CTAB was utilized as a suitable micellar medium for preconcentration and extraction of uranium VI complexes. Effect of extraction and reaction parameters was studied and optimum parameters were established. The analytical characteristics of the method e.g. linear range, limit of detection, preconcentration and improvement factors were obtained. Linearity was obeyed in the range of 0.2−10 ng mL−1 of uranium VI with a detection limit of 0.035 ng mL−1. The diverse ion effect of some anions and cations on the extraction efficiency of target ions was tested. The proposed method was successfully applied for the determination of uranium VI in various water samples. doi: 10.5562-cca1922

mixed micellar medium; cloud point extraction; spectrophotometry; uranium VI, chromotrope 2R



Author: M. B. Gholivand - ; Faculty of Chemistry, Razi University, Kermanshah, Iran M. Omidi - ; Faculty of Chemistry, Razi University, K

Source: http://hrcak.srce.hr/



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