Validating GC-MS workflows for postconsumer polyolefin migrants requires matrix-matched calibration, accurate mass deconvolution, and response-factor adjusted screening.
High resolution mass spectrometry quantifies recycled packaging contaminants through matrix-matched response factors and structural threshold exposure modeling.
Post-consumer resin dossiers require dual GC-HRMS and LC-HRMS screening with response-factor modeling to establish NIAS toxicological thresholds below 10 ppb.
Statistical uncertainty factors for polymer screening convert standard response factor variance into lower tolerance bounds that prevent non-target false negatives.
Quantifying semi-volatile photoinitiators in recycled polyolefins requires matrix-matched standard addition to counter 40% measurement uncertainty.
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