Migration of Tinuvin P and Irganox 3114 into milk and the corresponding authorised food simulant
Migration of Tinuvin P (UV stabiliser) and Irganox 3114 (antioxidant) from high-density polyethylene (HDPE) was studied. HDPE pieces were soaked in either milk (1.5% or 3.5% fat content) or 50% (v/v) ethanol–water mixture – the food simulant for milk as specified in Regulation
No. 10/2011/EC. The obtained extracts were analysed by LC-MS/MS. For statistical assessment variography was used. It proved to be a useful tool for making a distinction between the early migration range and the equilibrium, despite the variance of the data. Regulation No. 10/2011/EC specifies
10 days of contact time for milk at 5°C. Our experiments with the food simulant with 24 dm2 kg−1 surface/mass ratio showed that both Tinuvin P and Irganox 3114 need less than 1 h to reach equilibrium. Furthermore, 10-day experiments with daily sampling
showed that these additives are stable in milk, as well as in the food simulant. The effect of the concentration of the additives in HDPE was studied in the 0.01–5% (m/m) range. For both Tinuvin P and Irganox 3114 and all three extractants the migrated amount became independent of the
concentration of the additive in the HDPE approximately at 1% (m/m). For Tinuvin P the food simulant gave a close estimate for the milk samples. However, using the food simulant for modelling the migration of Irganox 3114 into milk gave an overestimation with a factor of minimum 3.5. In the
case of Tinuvin P special care must be taken, since the recommended amount in the HDPE can result in additive concentrations near or even over the specific migration limit (SML). However, Irganox 3114 cannot reach the SML either in milk or in the food simulant.
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Document Type: Research Article
Joint Research and Training Laboratory on Separation Techniques (EKOL), Eötvös Loránd University, Budapest, 1117, Hungary
Department of Physical and Applied Geology, Eötvös Loránd University, Budapest, 1117, Hungary
Polymer Chemistry Research Group, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, 1117, Hungary
Wessling International Research and Educational Center, Budapest, 1117, Hungary
Publication date: August 3, 2015