高压脉冲电场技术在杨梅保鲜中的应用研究

Study on the application of high pulse electric field technology in preserving Myrica rubra fruits

高压脉冲电场灭菌技术是国际上研究较为热门的非热灭菌技术之一。实验目的是探讨高压脉冲电场技术用于杨梅保鲜的可行性。工作电压100kV的高压脉冲电场由本实验室研制,将新鲜杨梅置于高压脉冲电场产品处理室中,设置不同电场参数(脉宽、频率、电场作用时间)对杨梅进行处理,通过分析对照组和处理组杨梅的pH变化以及气味、色泽等感官指标的变化来验证高压脉冲电场对杨梅的保鲜效果。结果显示影响杨梅保鲜的最主要因素是电场脉冲宽度,最佳的参数组合是脉宽10μs,频率80Hz,作用时间10s。结论:高压脉冲电场对杨梅保鲜有一定的效果。

High pulse electric field（HPEF） is a highly developing non-thermal sterilization technique in recent years. The aim was to investigate the feasibility of HPEF technique on keeping Myrica rubra fruits fresh.Samples of Myrica rubra fruits were put in the HPEF operate chamber, and then processed by setting different electric field parameters.By analyzing the changes of pH value, and sensory indexes such as smell and colour between the control group and dealing groups,the effect of Myrica rubra preservation by high pulse electric field could be invistigated.Results showed that：there was significant difference in pH value between control group and dealing groups;among the parameters （ pulse width, frequency and effect time） ,the most influencing factor to keep Myrica rubra fruits fresh was the pulse width ;the optimal parameter combination was pulse width for 10μs with frequency for 80Hz, and effect time for 10s. The results indicated that it was feasible by using high pulse electric field technology to keep Myrica rubra fruits fresh.