Analytical Evaluation Thresholds for Photopolymer Extractables: Coverage, Identification, Quantitation and Uncertainty

An analytical evaluation threshold (AET) is a decision threshold for chromatographic screening, not an instrument property and not a toxicological verdict. Its defensibility depends on the toxicologically based threshold supplied to the analytical study, the represented device and extraction scenario, sample-preparation factors, method coverage, response-factor variation, identification confidence and quantitation uncertainty. Photopolymer devices make these dependencies especially important because residual monomers, oligomers, photoinitiator- related species, additives, pigments, wash residues and transformation products can occupy very different chemical spaces. This review defines a non-compensatory architecture for deriving and applying an AET to photopolymer extractables. It separates the sample-domain threshold from the instrument-domain threshold, requires orthogonal coverage of volatility and polarity domains, and treats relative response factors and recovery as empirical distributions rather than universal constants. Peaks above the adjusted threshold require identification and toxicological routing; peaks below it are defensibly screened only inside a demonstrated method domain. Unknowns, poor responders, coelution and blank contamination remain explicit uncertainty. The resulting evidence package links every reported constituent to acquisition mode, identification level, quantitation basis and decision status without disclosing proprietary formulations or acceptance limits.

ER-253 · Version 0.4.