Novel modified carbon nanotubesas a selective sorbent for preconcentrationand determination of trace copper ionsin fruit samples

this work, multiwalled carbon nanotubes were reacted with N-[3-(triet-hoxysilyl)propyl]isonicotinamide to prepare pyridine-functionalized carbon nanotubes. Thisnovel sorbent was characterized by infrared spectroscopy, thermal and elemental analysis,and scanning electron microscopy. Functionalized carbon nanotubes were applied for thepreconcentration and determination of copper ions using flame atomic absorption spec-trometry. Various parameters such as sample pH, flow rate, eluent type and concentration,and its volume were optimized. Under optimal experimental conditions, the limit of detec-tion, the relative standard deviation, and the recovery of the method were 0.65 ng/mL, 3.2%and 99.4%, respectively. After validating the method using standard reference materials,the new sorbent was applied for the extraction and determination of trace copper(II) ions infruit samples. (PDF) Novel modified carbon nanotubes as a selective sorbent for preconcentration and determination of trace copper ions in fruit samples. Available from: https://www.researchgate.net/publication/263397293_Novel_modified_carbon_nanotubes_as_a_selective_sorbent_for_preconcentration_and_determination_of_trace_copper_ions_in_fruit_samples [accessed Dec 29 2018].

Carbon nanotubes; Copper; Fruit samples ;Solid-phase extraction;