Type

Journal Article

Authors

E Cummins
M Cruz-Romero
M Morris
J Kerry
M Cushen

Subjects

Chemistry

Topics
migration acetic acid transmission electron microscopy tem composites silver nanoparticles atomic spectroscopy food silver

Silver migration from nanosilver and a commercially available zeolite filler polyethylene composites to food simulants. (2014)

Abstract Polyethylene composites containing Agion(TM) commercial silver ion filler at three different percentage fill rates (0.5, 1.0 and 2% w/w) and polyethylene composites containing laboratory produced silver nanoparticles (Agnps) at two different percentage fill rates (0.1 and 0.5% w/w) underwent migration tests according to Commission Regulation (EU) No. 10/2011. Migrated silver in the two simulants (acidified water with 3% acetic acid and distilled water) was quantified using two techniques: inductively coupled atomic emission spectroscopy (ICPAES) and Hach Lange spectroscopy. The former had higher sensitivity with mean silver migration from Agion composites (n = 12) ranging from < 0.001 to 1.50 × 10(-2) mg l(-1). Mean silver migration from Agnps composites ranged from 4.65 × 10(-2) to 0.38 mg l(-1) and 8.92 × 10(-2) and 5.15 × 10(-2) mg l(-1) for Hach Lange spectrophotometry and ICPAES, respectively. Both percentage fill rate in the composite and the simulant type, as factors, were found to be significant in both silver migration from Agion (p < 0.0001 and < 0.01, respectively) and Agnps (p < 0.05 and < 0.01, respectively). Transmission electron microscopy (TEM) imagery showed differences in size distributions and morphology of particles (shape and degree of agglomeration) before and after migration. PE composites containing 0.5% Agion, simulating contact with non-acidic foods, was the only scenario that did not exceed the permitted migration level of non-authorised substances given in EU 10/2011. This study illustrates the need for careful engineering of the composite filler system to conform to limits with cognisance of food pH and percentage fill rate.
Collections Ireland -> University College Dublin -> PubMed

Full list of authors on original publication

E Cummins, M Cruz-Romero, M Morris, J Kerry, M Cushen

Experts in our system

1
Eoin P. Cummins
University College Dublin
Total Publications: 53
 
2
Michael A. Morris
University College Cork
Total Publications: 164
 
3
J P Kerry
University College Cork
Total Publications: 165