1. Migration and characterisation of nanosilver from food containers by AF⁴-ICP-MS
- Author
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G, Artiaga, K, Ramos, L, Ramos, C, Cámara, and M, Gómez-Gómez
- Subjects
Silver ,Food Packaging ,Microscopy, Electron, Scanning ,Nanoparticles ,Food Contamination - Abstract
In this work, silver migration from commercial food containers was evaluated according to European Regulation 10/2011. Several experimental parameters affected silver release: food simulant, temperature, exposition time and sampled bag area. Results demonstrated a significant silver nanoparticle (AgNP) migration into aqueous and acidic simulants. The amount of silver migrated increased with storage time and temperature although, in general, silver showed a low tendency to migrate into food simulants (17 ng/g). However, the food simulant did not seem to be a really outstanding variable for long term storage. AF(4)-ICP MS was used to confirm the presence of AgNPs in the simulants. The low limit of detection achieved (0.4 μg L(-1)) allowed the identification of AgNPs and their size characterisation (40-60 nm). Finally, scanning electron microscopy/energy-dispersive X-ray analysis suggested a possible transformation of the AgNPs detected in the extracts, due to association with other ligands, such as chlorine and sulphur, present in the original containers.
- Published
- 2014