高压电场低温等离子体对槟榔包装产品冷杀菌效能特性的影响

Effect on the cold sterilization of areca catechu packaging products by high voltage electric field and cold plasma

利用响应面法探究高压电场工作频率、电压、时间及氧气比例对槟榔的杀菌效能特性,结果表明:一定范围内,杀菌率随工作频率、电压、时间的提高而显著升高(P<0.05),当频率>100 Hz、时间>150 s,杀菌率变化不显著(P>0.05);回归分析表明频率的升高与电压、时间临界值的变化呈正相关(R^2=1),说明频率、电压及时间对槟榔杀菌有明显的交互作用;最佳杀菌参数为处理频率110 Hz、处理电压70.5 kV、氧气比例40%、处理时间180 s,此时的杀菌率为97.20%,与预测值(97.32%)接近,而且槟榔碱含量无明显变化,表明高压电场低温等离子体对槟榔包装产品有显著的杀菌效果,并对产品品质无显著影响。

Response surface methodology was used to explore the sterilization efficiency of areca catechu by working frequency,voltage,time and oxygen ratio of high voltage electric field.The results showed that within a certain range,the sterilization rate increased significantly with the increase of working frequency,voltage and time(P<0.05).When the frequency was higher than 100 Hz and the time exceeded 150 s,the sterilization rate did not change significantly(P>0.05).Regression analysis results showed that the increase of frequency was positively correlated with the changes of voltage and time critical values(R^2=1),indicating that frequency,voltage and time had obvious interaction on areca catechu sterilization.The best sterilization conditions were treatment frequency 110 Hz,treatment voltage 70.5 kV,oxygen ratio 40%,treatment time 180 s,sterilization rate 97.20%,which is close to the predicted sterilization rate 97.32%.There was no obvious change in arecoline content,indicating that high voltage electric field and cold plasma have significant sterilization effect on areca catechu packaged products and have no significant influence on product quality.