and these are in agreement with the results for the ICP-MS analysis. In this case, orange juice samples demonstrate the highest levels of migration, corresponding to 0.029 ± 0.01 mgL1. AAS was unable to detect the quantity of silver in food samples stored using nano-silver containers 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 relatively 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).