A gas chromatographic method to determine caprolactam migration from non-irradiated and irradiated multilayer polyamide 6 films into water food simulant was developed and validated. Linear range was 0.96 to 642.82 mu g/mL, with correlation coefficient of 0.9999. Limit of detection and quantification was 0.32 and 0.96 mu g/mL, respectively. Method precision showed RSD values lower than 2.1%, while method accuracy showed recovery from 89 to 105%. Caprolactam levels reduced with the increase of radiation dose for films used for meat foodstuffs, while for films used as cheese packaging only slight differences occurred.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)