Lipase immobilization onto polyethylenimine coated magnetic nanoparticles assisted by divalent metal chelated ions

- Synthesis of metal chelated magnetic nanoparticles.
- Lipase immobilized on nanoparticles by adsorption and metal chelation.
- Good reusability, storage time, optimal pH, and temperature of immobilized lipase.
- The immobilized lipase was used as biocatalyst for the synthesis of green apple flavor.