Abstract
The micellar extraction of 2,3,7-trihydroxyfluorones and their complexes with some metal ions was investigated. Сationic cetylpyridinium chloride ( CPC ) was used as surfactant for the formation of surfactant-rich phase. Phase separation of CPC at room temperature was induced by the addition of salicylic acid. The increasing of the extraction degree of 2,3,7-trihydroxyfluorones and their complexes as hydrophobicity of reagent increase was established. The quantitative extraction of the complex of Sb(III) with phenylfluorone into surfactant-rich phase was shown. The influence of concentration of CPC and salicylic acid on the absorption of Sb(III)-phenylfluorone solutions was studied. The optimum conditions for extraction of the complex into surfactant-rich phase were found. Spectrophotometric and colorimetric techniques for the determination of Sb(ІІІ) after micellar extraction were developed. Under the selected optimum conditions, the limits of detection ( LOD ) for Sb(III) were 5.0 and 1.0 µg L -1 for spectrophotometric and colorimetric procedure, respectively. The proposed methods for Sb(ІІІ) determination were applied for bottled mineral water and urine analysis. Key words: micellar extraction, antimony, phenylfluorone, cetylpyridinium chloride (Russian) DOI: http://dx.doi.org/10.15826/analitika.2014.18.1.011 M.G. Mandziuk, S.A. Kulichenko Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
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