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  Global Journal of Analytical Chemistry. Volume 2, Issue 3 (2011) pp. 125-132
  Research Article
Flame atomic absorption spectrometric determination of trace amounts of copper in different water samples after dispersive liquid–liquid microextraction
  Hayati Filika, Dilek Kilcana, Habibe Tezcanb, Güler Ekmekcib, Resat Apaka  
a Istanbul University, Faculty of Engineering, Department of Chemistry, 34320 Avcilar Istanbul, Turkey
b Gazi University, Gazi Education Faculty, Department of Chemistry, 06500 Ankara, Turkey

  A new microextraction technique termed dispersive liquid–liquid microextraction (DLLME) was developed. Dispersive liquid–liquid microextraction (DLLME) has been used for the preconcentration of copper(II), after formation of a complex with 1-(o-carboxyphenyl)-3,5-diphenylformazan (CPF) and subsequent analysis by flame atomic absorption spectrometry using a small amount of chloroform as the extraction solvent. Complex formation and extraction are usually affected by certain parameters, such as the type and volume of the extraction and disperser solvents, salt effect, pH, and the concentration of chelating agent, which have been optimised for the presented method. Under optimal conditions, the analytical figures of merit were: linear concentration range 2–150 µg L-1, preconcentration factor 26 (from 10 mL of water sample), limit of detection (LOD) 0.2 µg L-1, and relative standard deviation (RSD, n=5) 1.2 % (for 10 µg L-1 of copper). The method was successfully applied to the determination of trace amounts of Cu(II) in different water samples.
  Copper; Liquid liquid microextraction; Formazan; Atomic absorption spectrometry; Water samples  

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