Tenax Adsorption Bench Protocols for Differentiating Saturated and Aromatic Mineral Oils
Tenax TA vapor capture combined with LC-GC-FID and chemical epoxidation provides defensible separation of volatile MOSH and MOAH fractions in paperboard.
BfR Recommendation
Food Contact Compliance
Federal Institute for Risk Assessment guidelines govern the suitability of paper and board materials destined for direct contact with foodstuffs. Converting plants and paper mills apply specific migration limits to ensure that chemical residues from inks, coatings, and adhesives do not transfer to consumables above statutory thresholds. Regulatory oversight stops at the point of ingestion, meaning that chemical safety testing evaluates compounds migrating into food matrices rather than the structural strength of the packaging substrate.
Migration Threshold
Analytical testing determines the total specific migration of restricted substances from cellulose matrices into food simulants under defined temperature and time parameters. Gas chromatography and high performance liquid chromatography quantify extractable components such as phthalates, primary aromatic amines, and residual solvents from finished converted products. Laboratory protocols simulate worst case contact conditions for fatty, acidic, and dry foodstuffs to verify that migration values remain below specified limits per kilogram of food.
Substrate Formulation
Paper manufacturers restrict the inclusion of recycled fibres containing optical brightening agents, deinking chemicals, and mineral oils when producing substrates intended for sensitive culinary packaging. Converted structures rely on functional barriers or unbleached virgin pulp layers to prevent undesirable constituents from reaching sensitive contents. Chemical inventory management requires suppliers to declare constituent compositions so that converters can balance barrier performance against mechanical strength requirements without breaching regulatory migration ceilings.