Multisyringe flow injection spectrophotometric determination of uranium in water samples |
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Authors: | Jorge L. Guzmán Mar Leticia López Martínez Pedro L. López de Alba Nancy Ornelas Soto Víctor Cerdà Martín |
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Affiliation: | 1.Instituto de Investigaciones Científicas,Universidad de Guanajuato,Guanajuato,Mexico;2.Departamento de Química,Universidad de las Islas Baleares,Palma de Mallorca,Spain |
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Abstract: | A multisyringe flow injection analysis method for the determination of uranium in water samples was developed. The methodology was based on the complexation reaction of uranium with arsenazo (III) at pH 2.0. Uranium concentrations were spectrophotometrically detected at 649 nm using a light emitting diode. Under the optimized conditions, a linear dynamic range from 0.1 to 4.0 μg mL−1, a 3σ detection limit of 0.04 μg mL−1, and a 10σ quantification limit of 0.10 μg mL−1 were obtained. The reproducibility (%) at 0.5, 2.5, and 4.0 μg mL−1 was 2.5, 0.9, and 0.6%, respectively (n = 10). The interference effect of some ions was tested. The proposed method was successfully applied to the determination of uranium in water samples. |
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