壳聚糖-肉桂醛-β-CD包合物在抗菌纸中的迁移及对小香鸡的保鲜效果

Migration of Chitosan-cinnamaldehyde-β-cyclodextrin Inclusion Complex in Antibacterial Paper and Its Application for Preservation of Xiaoxiang Chicken

研究壳聚糖-肉桂醛-β-环糊精(β-cyclodextrin,β-CD)包合物在抗菌纸中的迁移行为及对小香鸡的保鲜效果。通过紫外分光光度法测定食品模拟液中肉桂醛迁移量,分析食品模拟液对肉桂醛迁移量的影响。采用Fick定律建立肉桂醛迁移模型,为此方面研究提供相对规范的量化参考。以菌落总数、pH值、TBA值、TVB-N值和感官评价为指标,对比对照组、包装组处理的小香鸡保鲜效果。结果表明:在4种食品模拟物中肉桂醛的迁移量大小为:50%乙醇>10%乙醇>60%甘油>正己烷,说明壳聚糖-肉桂醛-β-CD包合物抗菌纸对中高水分活度的食品有长效抗菌作用。应用于小香鸡保鲜时,以TVB-N≥20 mg/100 g为标准,对照组18 d时TVB-N值为19.48 mg/100 g,包装组25 d时TVB-N值为20 mg/100 g。与对照组相比,包装组能延长小香鸡7 d贮藏期。由上述结果可知,肉桂醛迁移速率受β-CD对其的控制释放和食品模拟液性质的双重影响,且该抗菌纸可有效延长小香鸡的保质期。

The migration behavior of chitosan-cinnamaldehyde-β-cyclodextrin(β-cyclodextrin,β-CD)inclusion complex in antibacterial paper and its effect on preservation of xiaoxiang chicken were studied.The migration amount of cinnamaldehyde to food simulants was determined by UV spectrophotometry.The effects of food simulants on the migration of cinnamaldehyde were analyzed.The model for cinnamaldehyde migration was established by the Fick’s law,which provided a relatively standardized quantitative reference for this research.The control group and the packaging group in preserving the quality of xiaoxiang chicken were evaluated by total bacterial count,pH,TBA,TVB-N and sensory features.Theresults showed that the migration of cinnamaldehyde to four food simulants was in the decreasing order of 50%ethanol>10%ethanol>60%glycerin>n-hexane,which indicated that the chitosan-cinnamaldehyde-β-CD inclusion complex antibacterial paper had a long-term antibacterial effect on foods with medium and high water activity.When applied on xiaoxiang chicken,TVB-N≥20 mg/100 g was used as the standard to judge meat spoilage and storage end point,the TVB-N value of the control group was 19.48 mg/100 g at day 18,and the TVB-N value of the packaging group was 20 mg/100 g at day 25.Compared with the control group,the packaging group could prolong the storage period of Xiaoxiang chicken for 7 days.According to the above results,the migration rate of cinnamaldehyde was affected by the controlled release ofβ-CD and the properties of the food simulant,and the shelf life of xiaoxiang chicken could be effectively extended by antibacterial paper.