Size characterization by Sedimentation Field Flow Fractionation of silica particles used as food additives

- Four types of SiO2 particles were characterized by SdFFF, PCS and EM techniques.
- Clusters of 10 nm nanoparticles were found in some SiO2 samples.
- A method was set up to extract SiO2 particles from food matrices.
- The effects of the carrier solution composition on SdFFF separations were evaluated.
- Particle size distributions were obtained from SiO2 particles extracted from foodstuffs.