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Abstract: In this study, a new sorbent was synthesized using surface imprinting technique. Cu(II)-imprinted multiwalled carbon nanotube sorbent (Cu(II)-IMWCNT) was used as the solid phase in solid phase extraction method. After the preconcentration procedure, Cu(II) ions were determined by high-resolution continuum source atomic absorption spectrometry. 0.1 mol L-1 EDTA was used to remove Cu(II) ions from the sorbent surface. The optimum experimental conditions for effective preconcentration of Cu(II), parameters such as pH, eluent type and concentration, flow rate, sample volume, sorbent capacity and selectivity were investigated. Syntesized solid phase was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The maximum adsorption capacities of Cu(II)-IMWCNT and non-imprinted solid phases were 270.3 and 14.3 mg g-1 at pH 5, respectively. Under optimum experimental conditions for Cu(II) ions, the limit of detection was 0.07 μg L-1 and preconcentration factor was 40. In addition, it was determined to be reusable without significant decrease in recovery values up to 100 adsorption-desorption cycles. Cu(II)-IMWCNT has a high stability. To check the accuracy of the developed method, certified reference materials and water samples were analyzed with satisfactory analytical results
Template and target information: copper ion, Cu(II)
Author keywords: carbon nanotubes, High-resolution continuum source atomic absorption spectrometry, preconcentration, Surface-ion imprinting technique, Trace metals