Development of green chemistry and sensitive method for preconcentration and determination of iron ions with modified multiwall carbon nanotubes using deferoxamine mesylate

Multiwall carbon nanotubes (MWCNTs) were modified through deferoxamine mesylate and used as an adsorbent for separation and preconcentration of the trace amount of iron ions in food samples followed by a simple, fast and sensitive spectrophotometric method was developed for the termination. The proposed separation and preconcentration method was performed in short time by using a small amount of chemical solvent. Also, the used adsorbent was environmentally friendly and highly compatible with the human body.

In this study iron was complex with deferoxamine. After extraction, the complex was eluted by HCl 2 % (v/v) and analyzed by a fast, straightforward, and inexpensive UV–Visible spectrometer method. The determination was performed with high selectivity, sensitivity and good accuracy. The calibration curve was linear in the range of 0.12 µg.L⁻¹ to 500 µg.L⁻¹. The detection limit was obtained 0.08 µg.L⁻¹. The suggested method was used for measuring the trace amount of iron ions in the five food samples: spinach, parsley, cooked pinto beans, and cooked sheep's liver. Based on the obtained results, the proposed method has shown proper sensitivity, accuracy, and repeatability.