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Determination of lead in natural waters using flow injection with on-line preconcentration and flame AAS detection

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  • Environmental Analysis
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Abstract

A rapid and sensitive method has been developed for the determination of lead in water samples by flame atomic absorption spectrometry using on-line preconcentration on a microcolumn packed with silica gel treated with a mixture of Aliquat 336 and nitroso-R-salt. The lead is retained at pH 5.5. The preconcentrated lead is directly eluted from the column to the nebulizer-burner system using 150 μL of 0.1 mol/L hydrochloric acid. The optimum preconcentration conditions are given and the retention efficiency achieved is higher than 80%. The enrichment factor is 37 and 100 for sample volumes of 5 and 30 mL, respectively. The limits of detection are 10.0, 6.0 and 4.0 ng/mL when 5, 10 and 30 mL of water is preconcentrated.

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Authors and Affiliations

  1. Departamento de Química Analítica, Facultad de Ciencias Químicas de la Universidad Complutense, E-28040, Madrid, Spain

    D. Rodríguez, P. Fernández, C. Pérez-Conde, A. Gutiérrez & C. Cámara

Authors
  1. D. Rodríguez
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  2. P. Fernández
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  3. C. Pérez-Conde
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  4. A. Gutiérrez
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  5. C. Cámara
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Rodríguez, D., Fernández, P., Pérez-Conde, C. et al. Determination of lead in natural waters using flow injection with on-line preconcentration and flame AAS detection. Fresenius J Anal Chem 349, 442–446 (1994). https://doi.org/10.1007/BF00322930

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  • DOI: https://doi.org/10.1007/BF00322930

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