Study on Irradiation Technology and Sterilizing Effect of Electron Beam on Quick-Frozen Asparagus

Abstract:

Study on irradiation technology and sterilizing effect of quick-frozen asparagus，the D10 value of Staphylococcus aureus（ATCC 6538） and Enterohemorrhage E．Coli（ATCC 43895），product bioburden，sensory and nutritional qualities were determined with electron beams irradiation.The test results showed thatthe D10 value of Staphylococcus aureus，Enterohemorrhage E.coli were respectively 0.35 kGy and 0.25 kGy，among the asparagus inoculated with bacterial suspension.Radiation dose of 4.0 kGy，the colonies，mold and coliform bacteria were not detected.In addition to vitamin C decreased rapidly，sensory and nutritional indicatorsdid not obviously change. Penetration depth and Dose distribution of electron beams indicated that quick-frozen asparagus used double-sided irradiation，irradiation depth was 14.2cm，unevenness was 1.15. The doseless than 4.0 kGy was recommended to irradiate frozen asparagus，can effectively control food-borne pathogens and Guarantee products safety.