Non-Intentionally Added Substances Screening Protocols for Aqueous Barrier Treated Packaging
Non-targeted high-resolution screening isolates unknown migrants from aqueous paper coatings to guarantee toxicological compliance below threshold limits.
Non-Targeted Screening
Broadband Assay
Analytical chemistry defines open-ended instrumental characterization designed to detect both predicted and unknown chemical substances without historical reference standards as an essential safety methodology. Deploying non-targeted screening on food contact paper and board extracts isolates non-intentionally added substances, adhesive breakdown byproducts, and printing ink constituents. This methodology pairs high-resolution accurate mass spectrometry with gas or liquid chromatography to profile broad contaminant spectra across packaging materials.
Chemical identification remains provisional until matched against high-resolution spectral databases or authentic chemical reference standards.
Analytical Protocol
Laboratorians extract packaging substrates with food simulants, including ethanol solutions, water, or synthetic poly(2,6-diphenyl-p-phenylene oxide), under elevated temperatures representing accelerated shelf-life aging. Chromatographic separation resolves hundreds of individual chemical peaks, which are subsequently ionized via electrospray or electron ionization methods for mass analysis. Time-of-flight and orbitrap mass analyzers capture exact molecular masses and characteristic isotopic fragmentation patterns with sub-part-per-million mass accuracy.
Algorithmic peak deconvolution filters instrumental noise from true migration signals, flagging chemical features that breach regulatory exposure thresholds. Structural elucidation requires cross-referencing empirical formulas with chemical registries and toxicology libraries to separate benign packaging additives from dangerous migrants.
Regulatory Verification
Packaging converters use these broad screening profiles to substantiate framework compliance under European and American food contact material regulations. Detecting unpredicted photoinitiators, slip additives, or oligomers prompts targeted toxicological evaluation before materials reach retail distribution. High equipment cost and complex data processing restrict this comprehensive assay to compliance verification and formal safety investigations.