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- Title
Preconcentration of cobalt ions by a melamine-modified cellulose@MWCNT nanohybrid.
- Authors
Karimi, Mohammad; Ghasemi, Mohammed; Aghagoli, Mohammad; Beyki, Mostafa
- Abstract
Melamine functionalized cellulose@carbon nanotubes were prepared by the following method: (a) Cellulose was dissolved in a mixture of urea and NaOH solutions and then mixed with multiwall carbon nanotubes; (b) the MWCT-modified cellulose was precipitated by addition of water; (c) the MWCNTs were activated with thionyl chloride, and finally reacted with melamine. The resulting sorbent was used in preconcentration of Co(II) ions prior to their determination by flame atomic absorption spectroscopy. The sorbent was characterized by FTIR and field emission scanning electron microscopy. The effects of the pH value of the medium, contact time, and elution conditions were optimized. The calibration plot is linear in the 3 to 200 μg·L‾ Co(II) concentration range, the limit of detection is 0.8 μg·L‾, and the relative standard deviation (at a concentration of 100 μg·L‾) is 3.5 %. The maximum sorption capacity is 167 mg·g‾. The method was applied to the preconcentration of cobalt ions from (spiked) food and water samples and gave recoveries between 96 and 102 %.
- Subjects
COBALT; MELAMINE; MULTIWALLED carbon nanotube synthesis; SOLUTION (Chemistry); CELLULOSE; METAL ions
- Publication
Microchimica Acta, 2016, Vol 183, Issue 11, p2949
- ISSN
0026-3672
- Publication type
Article
- DOI
10.1007/s00604-016-1943-z