Room-temperature liquid phosphorimetry of the aluminium-ferron chelate in micellar media : Determination of aluminium |
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Authors: | M.R. Fernández de la Campa M.E. Díaz García Alfredo Sanz-Medel |
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Affiliation: | Department of Analytical and Physical Chemistry, University of Oviedo, Oviedo Spain |
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Abstract: | Aluminium reacts with 7-iodo-8-quinolinol-5-sulphonic acid (Ferron) in cetyltrimethylammonium bromide (CTAB) micelles to form a highly phosphorescent complex at room temperature. Suitable experimental conditions and the phosphorescent characteristics of the complex are described. Comparison with the results obtained for the phosphorescent niobium-Ferron complex in CTAB micelles helps to elucidate the mechanism of this type of phosphorescence. For aluminium the detection limit is 5.4 ng ml?1; the relative standard deviation is 4.5% for 20 μg Al. The method is applied to aluminium determination in waters and dialysis fluids. |
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