title: Nano selenium as antioxidant agent in a multilayer food packaging material.
abstract: Selenium nanoparticles (SeNPs) were incorporated in a flexible multilayer plastic material using a water-base adhesive as vehicle for SeNPs. The antioxidant performance of the original solutions containing spherical SeNPs of 50-60 nm diameter, the adhesive containing these SeNPs, and the final multilayer plastic material to be used as food packaging were quantitatively measured. The radical scavenging capacity due to SeNPs was quantified by a free radical assay developed in the laboratory and by the diphenyl-1-picrylhydrazyl (DPPH) method. DPPH was not efficient to measure the scavenging capacity in the multilayer when the free radical scavenger is not in the surface in contact with it. Several multilayer laminated structures composed by [PET (20 m)-adhesive-LDPE (with variable thickness from 35 to 90 μm)] were prepared and measured, demonstrating for the first time that free radicals derived from oxygen (OH·, O2·, and O2H) cross the PE layer and arrive at the adhesive. SeNPs remain as such after manufacture and the final laminate is stable after 3 months of storage. The antioxidant multilayer is a non-migrating efficient free radical scavenger, able to protect the packaged product versus oxidation and extending the shelf life without being in direct contact with the product. Migration tests of both Se and SeNPs to simulants and hazelnuts demonstrated the non-migrating performance of this new active packaging. Graphical abstract ᅟ.
authors: Analytical Chemistry Department, GUIA Group, I3A, CPS, University of Zaragoza, Maria de Luna 3, 50018, Zaragoza, Spain.
authors: Paula
authors: P
authors: Vera
authors: Analytical Chemistry Department, GUIA Group, I3A, CPS, University of Zaragoza, Maria de Luna 3, 50018, Zaragoza, Spain.
authors: Yolanda
authors: Y
authors: Echegoyen
authors: Analytical Chemistry Department, GUIA Group, I3A, CPS, University of Zaragoza, Maria de Luna 3, 50018, Zaragoza, Spain.|Samtack Adhesivos Industriales, C/ Cerámica, n°3, Pol. Ind. Magarola Sud, 08292, Esparreguera, Barcelona, Spain.
authors: Elena
authors: E
authors: Canellas
authors: Analytical Chemistry Department, GUIA Group, I3A, CPS, University of Zaragoza, Maria de Luna 3, 50018, Zaragoza, Spain. cnerin@unizar.es.
authors: Cristina
authors: C
authors: Nerín
authors: Analytical Chemistry Department, Facultad de Ciencias Químicas, University Complutense of Madrid, Avenida Complutense s/n, 28040, Madrid, Spain.
authors: María
authors: M
authors: Palomo
authors: Analytical Chemistry Department, Facultad de Ciencias Químicas, University Complutense of Madrid, Avenida Complutense s/n, 28040, Madrid, Spain.
authors: Yolanda
authors: Y
authors: Madrid
authors: Analytical Chemistry Department, Facultad de Ciencias Químicas, University Complutense of Madrid, Avenida Complutense s/n, 28040, Madrid, Spain.
authors: Carmen
authors: C
authors: Cámara
mesh_terms: D000269:Adhesives / Q000737:chemistry; D001713:Biphenyl Compounds / Q000737:chemistry; D018857:Food Packaging / Q000379:methods*; D063427:Food Quality; D016166:Free Radical Scavengers / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D010851:Picrates / Q000737:chemistry; D012643:Selenium / Q000737:chemistry*
chemical_list: D000269:Adhesives; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D005609:Free Radicals; D010851:Picrates; C004931:1,1-diphenyl-2-picrylhydrazyl; D012643:Selenium
keywords: Active packaging; Antioxidant; DPPH; Free radical scavenger; Migration; Selenium nanoparticles