Isaac Scientific Publishing

Advances in Food Science and Engineering

Development of an Analytical Procedure to Determine Partition Coefficients of Selected Model Migrants between Lowdensity Polyethylene and Polyamide and Nanocomposite Polyamide

Download PDF (211.8 KB) PP. 59 - 67 Pub. Date: June 22, 2017

DOI: 10.22606/afse.2017.12001

Author(s)

  • Pablo Otero-Pazos
    Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Pharmacy, University of Santiago de Compostela, 15782-Santiago de Compostela, Spain
  • David Antonio Pereira de Abreu
    Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Pharmacy, University of Santiago de Compostela, 15782-Santiago de Compostela, Spain
  • Raquel Sendon*
    Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Pharmacy, University of Santiago de Compostela, 15782-Santiago de Compostela, Spain
  • Ana Rodríguez Bernaldo de Quirós
    Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Pharmacy, University of Santiago de Compostela, 15782-Santiago de Compostela, Spain
  • Inmaculada Angulo
    Department of Plastic and Composites. GAIKER (Research Centre), 48170 Zamudio–Bilbao, Spain
  • Jose Manuel Cruz
    Department of Chemical Engineering, E.T.S.E.I., University of Vigo, 36200-Vigo (Pontevedra), Spain
  • Perfecto Paseiro
    Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Pharmacy, University of Santiago de Compostela, 15782-Santiago de Compostela, Spain

Abstract

Polymeric materials have been extensively used in food packaging. The main problem associated to plastics is the migration of low molecular substances from the material to the food, which may be potentially dangerous for the consumers’ health. The key parameters of the migration are the partition and diffusion coefficients. The development of polymer nanocomposites is expected to provide new materials with enhanced properties and safer food packaging. This work describes a procedure to determine the partition coefficients of selected model substances between low-density polyethylene (LDPE) and polyamide (PA) and, between LDPE and nanocomposite polyamide (naPA). The assays were conducted at different time-temperature conditions. The model migrants were extracted from the polymeric materials with ethanol and analyzed by RP-HPLC-DAD-FLD. The values of the partition coefficients obtained ranged from 0.01 to >1000. The results obtained suggest that the incorporation of nanocomposites could affect the solubility of certain compounds into the polymeric matrix.

Keywords

Partition coefficient, nanocomposite, packaging, migration, polyethylene, polyamide

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