Pork samples were soaked in antioxidant solution(1 g/L)

vacuum-packaged

irradiated at 3 kGy by Co y-rays or 10 MeV electron beams

and refrigerated at 0℃-4℃for 30 d.On Day 1

10

20

25 and 30 post irradiation

total bacterial counts

peroxide values

thiobarbituric acid reactive substances

volatiles and off-odor of the irradiated pork samples were analyzed.The total bacterial counts were<10 cfu/g on Day 30.The peroxide values

thiobarbituric acid reactive substances and volatiles contents of pork irradiated by theγ-rays were higher than pork irradiated by electron beams.Pork irradiated byγ-rays combined with antioxidant treatment was most close to the control in odor

with a similarity of 89.68%.The results showed that E-beam irradiation reduced lipid oxidation and volatiles contents

γ-ray irradiation helped to reduce off-odor

and addition of antioxidant could effectively reduce lipid oxidation and off-odor.