and these are in agree- ment with the results for the ICP-MS analysis. In this case, orange juice samples demonstrate the highest levels of migration, corre- sponding to 0.029 ± 0.01 mgL1. AAS was unable to detect the quantity of silver in food samples stored using nano-silver con- tainers due to the low levels apparent. Similar results have been anticipated by others (Simon, Chaudhry, & Bakos, 2008), who studied the migration of nanoparticles based on a physicochemical model and predicted that migration would be detected exclusively in the case of 1 nm sized particles which are bound within polymer matrices possessing relatively low dynamic viscosities such PP. For larger sized nanoparticles bound in polymer matrices with rela- tively high dynamic viscosities, for example PS, the migration levels are predicted to be detectable. However; it remains the case that 450/2009/EC Regulation states that nanoparticles should be eval- uated on a case-by-case basis until more information is known about them (Restuccia et al 2010).