Compared to inorganic or simply organic iron, amino acid chelated iron has such virtues as higher bioactivity, lower pollution and higher safety.

The synthesis of methionine chelated iron(II) for iron-fortified food additive with methionine and ferrous sulphate by solid state reaction under microwave irradiations was studied.

The desulphurization mechanism of chelated iron was introduced and the key to the process was regeneration of chelated iron. The regeneration conditions for chelate iron were examined.