Modeling sunset yellow removal from fruit juice samples by a novel chitosan-nickel ferrite nano sorbent

FTIR analysis

The FTIR spectra of Cs, NiFe₂O₄ NPs, and Cs@NiFe₂O₄ NPs are presented in Fig. 2. The FTIR spectrum of Cs indicates a broad band at 3600–3267 cm^-1 attributed to O–H (hydroxyl group) and NH₂ (amine group) starching vibrations^48,49, sharp peaks owing to symmetric and asymmetric C–H stretching vibrations at 2901 cm⁻¹ and 2806 cm⁻¹, respectively, and peaks at 1638, 1423, and 1194 cm^-1 due to N–H (amide I) bending, C–N carboxylic vibrations of the glycoside ring, C–O–C respectively^50,51.

The FTIR…