Technical Standard
International specifications for the determination of specific chemical substances in paper and board ensure the safety of materials intended for contact with food. ISO 18373 defines the analytical procedures for measuring the migration of phthalates and other plasticizers into food simulants. This standard provides a framework for laboratories to verify compliance with global health regulations.
Manufacturers use these protocols to certify that their packaging products do not transfer harmful levels of synthetic compounds.
Testing Protocol
The methodology involves solvent extraction followed by gas chromatography or mass spectrometry to identify trace amounts of contaminants. Within the scope of ISO 18373, the focus remains on the precision of the extraction step to ensure all target analytes are recovered from the fibrous matrix. Calibration standards must be used to quantify the concentration of each substance relative to the mass of the paper sample.
Different simulants, such as vegetable oil or aqueous solutions, are selected based on the type of food the packaging will hold. Results allow for the assessment of risks associated with long-term storage and high-temperature conditions.
Compliance Requirement
Supply chains rely on these documented test methods to maintain transparency. Adherence to the standard facilitates the international trade of paper-based packaging materials.
