Direct screening of food packaging materials for post-polymerization residues, degradation products and additives by liquid extraction surface analysis nanoelectrospray mass spectrometry (LESA-nESI-MS)

Ambre Issart , Simon Godin (1) , Hugues Preud'Homme (1) , Katarzyna Bierla (1) , Ahmed Allal (1) , Joanna Szpunar (1)

1 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux

Materials in direct contact with food should be monitored for the presence of species able to migrate into food. A direct method based on liquid extraction surface analysis nanoelectrospray mass spectrometry (LESA-nanoESI-MS) was developed for the analysis of the migrating species from a polymer film. Different types of molecules: post-polymerization residues, degradation products (oligomers resulting from polymer recycling, products of polymer oxidative degradation) and anti-oxidant additives (vitamin E) were demonstrated to be detected and identified, and determined quantitatively if relevant calibration standards are available. The method was validated by a comparison a standard method based on with bulk extraction mass spectrometry. It offers considerable advantages over the latter in terms of drastically reduced analysis time and solvent consumption. Also, LESA-nanoESI-MS produced simpler spectra (limited to compounds able to migrate into food) than Direct Analysis in Real Time (DART).

Mots clés: Food packaging; Liquid extraction surface analysis (LESA); Nanoelectrospray mass spectrometry (ESI MS); Polymer degradation products; Polymer additives

Domaines: Chimie théorique et/ou physique; Chimie analytique; Polymères; Matériaux

Ambre Issart, Simon Godin, Hugues Preud'Homme, Katarzyna Bierla, Ahmed Allal, et al.. Direct screening of food packaging materials for post-polymerization residues, degradation products and additives by liquid extraction surface analysis nanoelectrospray mass spectrometry (LESA-nESI-MS). Analytica Chimica Acta, 2019, 1058, pp.117-126. ⟨10.1016/j.aca.2019.01.028⟩. ⟨hal-02013591⟩