Are Citric Acid-Iron II Complexes True Chelates or Just Physical Mixtures and How to Prove This?

ABSTRACT: Although mineral chelates are widely produced to be used as food fortifiers, the proof that these complexes are chelates is still missing. In our present work, iron II complexes using citric acid in different ratios are produced, and the occurrence of chelation is investigated along with its behavior according to a molar ratio between the ligand and the mineral. High performance liquid chromatography (HPLC), flame atomic absorption spectroscopy (FAAS), ultraviolet-visible spectroscopy (UV-Vis), Fourier-transform infrared (FTIR), and near infrared spectroscopy (NIR) were used for a non-structural characterization of these complexes. In contrast to published work, our findings show that the chelation of citric acid is achieved in the liquid form and at a low pH and that the molar ratio is ve

SUBMITTER: Mattar G 

PROVIDER: S-EPMC9858486 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature