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Trace level enrichment of lead from environmental water samples utilizing dispersive liquid-liquid microextraction and quantitative determination by graphite furnace atomic absorption spectrometry
Dispersive liquid-liquid microextraction (DLLME) was developed and successfully applied, as a sample preconcentration and extraction method, for the determination of trace quantities of lead (Pb) in environmental water samples utilizing graphite furnace atomic absorption spectrometer (GFAAS). Experimental parameters optimized include; extraction and disperser solvent types and their volumes, pH, extraction period, effect of the co-existing ions and the amount of chelating agent, ammonium pyrrolidine dithiocarbamate (APDC). Under the optimized conditions, enrichment factor of 195 at 5 μg L−1 level and detection limit of 0.16 μg L−1 were obtained. Linearity from 25–75 μg L−1 with R2 of 0.995 was achieved. The procedure was validated utilizing four environmental water samples at the spiking levels of 10 and 20 μg L−1 and the corresponding recoveries ranged from 89.6 to 95.1% and 91.6 to 97.1%, respectively, indicating the reliability and applicability of the method for selective extraction of trace level lead.
Trace level enrichment of lead from environmental water samples utilizing dispersive liquid-liquid microextraction and quantitative determination by graphite furnace atomic absorption spectrometry
Dispersive liquid-liquid microextraction (DLLME) was developed and successfully applied, as a sample preconcentration and extraction method, for the determination of trace quantities of lead (Pb) in environmental water samples utilizing graphite furnace atomic absorption spectrometer (GFAAS). Experimental parameters optimized include; extraction and disperser solvent types and their volumes, pH, extraction period, effect of the co-existing ions and the amount of chelating agent, ammonium pyrrolidine dithiocarbamate (APDC). Under the optimized conditions, enrichment factor of 195 at 5 μg L−1 level and detection limit of 0.16 μg L−1 were obtained. Linearity from 25–75 μg L−1 with R2 of 0.995 was achieved. The procedure was validated utilizing four environmental water samples at the spiking levels of 10 and 20 μg L−1 and the corresponding recoveries ranged from 89.6 to 95.1% and 91.6 to 97.1%, respectively, indicating the reliability and applicability of the method for selective extraction of trace level lead.
Trace level enrichment of lead from environmental water samples utilizing dispersive liquid-liquid microextraction and quantitative determination by graphite furnace atomic absorption spectrometry
Teju, Endale (author) / Tadesse, Bezuayehu (author) / Megersa, Negussie (author)
Journal of Environmental Science and Health, Part A ; 49 ; 833-842
2014-06-07
10 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016