Study Of Refreshing Effect On Chilled Pork By Natural Preservative

Purpose This research was in order to obtain safe and effective combined natural preservatives by using our very rich farm products resources such as gingerol , allicin,tea polyphenols, chitosan and Nisin and carrying out quantitative analysis by effective ingredient . This research was also wanted to contributed to the development of chilled meat and agricultural economics.Methods①Determined the process of chilled pork: The good process of chilled meat was abtained by single factor test for the pretreatment conditions, vacuum-packed and preservation conditions.②Determined the sorts and concentration of combined natural preservative: The sorts and concentration of combined natural preservative were determined by single factor test.③Determined the better formula of combined natural preservative: The better formula of combined natural preservative was determined by orthogonal experiment.④The research of refreshing effect for combined natural preservative: The refreshing effect of combined natural preservative was studied by verification test and taked the meat had no preservative as blank.Results①The good process of chilled meat was that the fresh meat was vacuum-packed after pretreatment and drained by hot water and naturally fresh liquid(apparent vacuum—0.1 MPa; evacuating time 33s; cooling time 20s; final encapsulation time 20s; heating temperature of final encapsulation middle temperature ), then stored in 4℃.②The sorts and concentration of combined natural preservative were as following: gingerol 1.0%,1.5%, 2.0%; tea-polyphenols 0.5%,1.0%,2.0%; allicin 0.05%, 0.15%, 0.3%; chitosan 1.0%,1.5%,2.0%.③The better formula of combined natural preservative was as following: 2.0% tea polyphenols, 2.0% gingerol, 1.0% chitosan, 0.3% allicin. The refreshing effect of this combined natural preservative was displayed by verification test and the effect was significant.Conclusion The result showed that the combined natural preservative has great refreshing efforts and was very safe .This research established the base for the application and development of natural preservative and refreshing technology of chilled pork, and providing a direction for agricultural economics. This research has great application and economic values.