From Additive Migration from Plastics into Foods: A Guide for Analytical Chemists
This approach involves a direct determination of substances in the packaged food that have migrated from the polymer. This is perhaps not a very appealing approach as it involves determination of migrants in what are often very complex foodstuff matrices presenting great analytical difficulties. Neither is this approach discussed to any great extent by the various regulatory bodies such as the European Union (EU) or the Food and Drug Administration (FDA).
Therefore, the subject is not discussed extensively in this book and what follows is not a complete coverage of the subject. Nevertheless it is included here as it may appeal to some commodity packagers as a means of quality control of their product. This, of course, does not exempt the supplier of additives or the food package from attaining the necessary official approvals,
17.1 Antioxidants
Hartman and Rose [1] described a rapid gas chromatographic (GC) method for the determination of butylated hydroxy anisole ( t-butyl-4-methoxyphenol; BHA) and butylated hydroxy toluene (2,6-di- t-butyl- p-cresol; BHT) in vegetable oils. To 2.5 g of oil was added 150 ?g of methyl undecanoate (as internal standard) in 5 ml of carbon disulfide, this was then diluted to 25 ml with carbon disulfide. A 3 to 7 ?l aliquot was analysed by GC on an aluminium column (1.8 m 4.5 mm) or a glass column (1.8 m 4 mm) containing 10% of DC200 on gas chrom Q (80 to 100 mesh), operated at 160 C with helium...
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