POSH

Analysis Method

These compounds are separated and identified using high performance chromatography coupled with mass spectrometry or flame ionization detection. It is difficult to distinguish them from mineral oil saturated hydrocarbons because their molecular structures are very similar, requiring advanced clean-up and separation techniques. The laboratory extracts the substances from both the paperboard and the food simulant to calculate the transfer rate under defined storage temperatures.

This analytical process is essential for verifying that polymer-coated paperboards do not release unacceptable levels of synthetic chemicals into the package contents.

Migration Barrier

Applying a functional barrier coating, such as a specialized water-based polymer or a high-density starch layer, blocks the movement of these compounds. When paperboard is recycled, these synthetic residues from hot-melt adhesives can accumulate in the pulp, making barrier coatings necessary for food-contact board. This measurement of synthetic migrants ensures that the final packaging meets all safety standards for consumer health.