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Journal of Analytical Science and Technology
Fig. 2 | Journal of Analytical Science and Technology

Fig. 2

From: Determination of copper(II) by flame atomic absorption spectrometry after its perconcentration by a highly selective and environmentally friendly dispersive liquid–liquid microextraction technique

Fig. 2

Effect of solution pH on the extraction of Cu(II) ions by DLLME method. Conditions: sample volume, 10.0 mL; Cu(II) ion concentration, 50.0 μg L−1, salophen concentration, 2.0 × 10−5 M; extraction solvent (chloroform) volume, 110 μL; disperser solvent (acetone) volume, 1.30 mL; diluting solvent (ethanol) volume, 140 μL; centrifuge time, 5 min (at 5000 rpm)

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