Study on Off-Odor Volatiles of Irradiated Packaged Raw Pork

【Objective】 Analysing the compositions of off-odor volatiles in irradiated refrigerated vacuum-packaged pork and research on its origin. 【Method】 First, the off-odor volatiles were collected by a cooled via in liquid nitrogen, then the main composition of off-odor volatiles were analyzed by gas chromatograph mass spectrometry (GC-MS). 【Result】 The main composition of off-odor volatiles are dimethyl disulfide, dimethyl sulfide, dimethyl trisulfide, methanethiol and S-methyl thioacetate. The off-odor volatiles come from irradiated cystine, methionine and VB1. 【Conclusion】 The main composition of off-odor volatiles are S-containing compounds from irradiated S-containing amino acid and VB1.