Application of FTIR and Raman microspectroscopy to the study of food/packaging interactions.
This study assesses the suitability of Fourier transform infrared spectrometer (FTIR) and Raman spectroscopy for potential use as analytical tools to determine the diffusivity of a migrant in a plastic packaging material, one of the key points in safety assessment of food-contact materials. Despite its relative low sensitivity, FTIR-based analysis supplied data for the material on desorption of an additive (Uvitex OB) and sorption of a food constituent (olive oil) in a non-destructive and 'in situ' mode. These data allowed the determination of the diffusivity of Uvitex OB (8.0 +/- 2.5 x 10(-14) m(2) s(-1)) and olive oil (6.9 +/- 3.4 x 10(-14) m(2) s(-1)) in Linear Low Density Polyethylene (LLDPE). Raman cartography innovatively supplied the profile of additive concentration in the z-direction (thickness) of the food-contact material and confirmed that mass transfer in the system roughly followed a Fickean behaviour.
Mauricio-Iglesias
M
M
Joint Research Unit Agro-polymers Engineering and Emerging Technologies-UMR 1208 IATE, University Montpellier 2, Montpellier cedex, France.
Guillard
V
V
Gontard
N
N
Peyron
S
S
D004058:Diffusion; D005504:Food Analysis / Q000379:methods; D005506:Food Contamination / Q000032:analysis*; D018857:Food Packaging; D006801:Humans; D000069463:Olive Oil; D010938:Plant Oils; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013059:Spectrum Analysis, Raman / Q000379:methods
D000069463:Olive Oil; D010938:Plant Oils