微波解冻对冷冻食品菌落总数的影响

目的]探讨微波炉解冻方法对冷冻食品菌落总数的影响。方法]采用700 W功率微波炉30%的火力,分别对3种不同重量的3类冷冻食品进行不同解冻时间的微波解冻处理,比较解冻前后样品的菌落总数。结果]对于100、250和500 g的冷冻鱼类和贝类样品进行解冻,解冻时间应分别控制在20、30和60 s,解冻后样品适合剪切且不影响菌落总数的检测结果;对于100、250和500 g的冷冻肉类样品,其解冻时间应分别控制在30、45和90 s,解冻后对样品菌落总数的检测无影响。结论]微波解冻可用于微生物学检验中冷冻食品的快速解冻。

Effects of Microwave Thawing on Aerobic Plate Count in Frozen Food

Objective] The aim was to study the effects of microwave thawing on aerobic plate count in frozen food.Method] 3 kinds of frozen food weighted 100,250 and 500 g were thawed at 30% firepower of 700 W microwave oven for 10,20,30,45,60 and 90 s respectively,and the aerobic plate count in samples after and before thawing was counted and compared.Result] As for frozen fish and shellfish samples weighted 100,250 and 500 g,the thawing time should be controlled at 20,30 and 60 s respectively,and the samples were suitble for cutting after thawing,and there was no effect on the determination of aerobic plate count.As for frozen meat samples weighted 100,250 and 500 g,the thawing time should be controlled at 30,45 and 90 s respectively,and there was no effect on the determination of aerobic plate count after thawing.Conclusion] As a thawing method with high efficiency,microwave thawing could be used in the frozen food microbiological examination.