Challenges in isolating silica particles from organic food matrices with microwave-assisted acidic digestion.

ABSTRACT: Synthetic amorphous silica is widely used in food processing as a food additive (E551) due to its properties as a flavour carrier and anti-caking agent. The direct measurement of E551 suspended or embedded in complex matrices is difficult without prior removal of the matrix components. The isolation of nanoparticles from the matrix is hence the first step towards their comprehensive characterization. Due to its complexity, matrix removal is frequently not trivial and may cause modification of the number-size distribution of the silica particles. The isolation of engineered silica nanoparticles by removal of the matrix with microwave-assisted acidic digestion is demonstrated methodologically using both monodisperse (size standards) and polydisperse (E551) particles spiked into ultrapure wat

SUBMITTER: Geiss O 

PROVIDER: S-EPMC6704109 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature