Dispersive liquid-liquid microextraction (DLLME) combined with graphite furnace atomic absorption spectrometry (GFAAS) for determination of trace Cu and Zn in water Samples
1 Department of chemistry, Saveh Branch, Islamic Azad University, Saveh, Iran
2 Nuclear Science Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
3 Department of chemistry, Karaj Branch, Islamic Azad University Karaj, Iran
Dispersive liquid-liquid microextraction (DLLME) combined with graphite furnace atomic absorption spectrometry (GFAAS) was proposed for the determination of trace amounts of Copper and Zinc ions using 8-hydroxyquinoline (8-HQ) as chelating agent. Several factors influencing the microextraction efficiency of Cu and Zn and their subsequent determinations, such as pH, extraction and disperser solvent type and their volume, concentration of the chelating agent and extraction time were studied, and the optimized experimental conditions were established. After extraction, the enrichment factors were 25 and 26 for Cu and Zn, respectively. The detection limits of the method were 0.025 and 0.0033 μg/L for Cu and Zn, and the relative standard deviations (R.S.D) for five determinations of 1 ng/ml Cu and Zn were 8.51% and 7.41%, respectively.
Key words: Dispersive liquid- liquid micro extraction (DLLME) / Graphite furnace atomic absorption spectrometry / copper / Zinc / water samples
© Owned by the authors, published by EDP Sciences, 2014
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