Journal
FOOD CHEMISTRY
Volume 220, Issue -, Pages 242-248Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.09.005
Keywords
Copper; Dispersive liquid-liquid microextraction; Solidification of floating organic drop; N-o-Vanillidine-2-amino-p-cresol; Rice flour; Water
Funding
- Balikesir University [2016/64]
- Unit of the Scientific Research Projects of Balikesir University
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A novel, simple, rapid, sensitive, inexpensive and environmentally friendly dispersive liquid-liquid microextraction method based on the solidification of a floating organic drop (DLLME-SFO) was developed for the determination of copper by flame atomic absorption spectrometry (FAAS). N-o-Vanillidine-2-amino-p-cresol was used as a chelating ligand and 1-undecanol was selected as an extraction solvent. The main parameters affecting the performance of DLLME-SFO, such as sample pH, volume of extraction solvent, extraction time, concentration of the chelating ligand, salt effect, centrifugation time and sample volume were investigated and optimized. The effect of interfering ions on the recovery of copper was also examined. Under the optimum conditions, the detection limit (3 sigma) was 0.93 mu g L-1 for Cu using a sample volume of 20 mL, yielding a preconcentration factor of 20. The proposed method was successfully applied to the determination of Cu in tap, river and seawater, rice flour and black tea samples as well as certified reference materials. (C) 2016 Published by Elsevier Ltd.
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