苦豆子多糖与大黄和黄连提取液复合涂膜对鸡蛋常温贮藏的影响

摘要

以苦豆子半乳甘露聚糖为成膜基质,添加适量的CaCl2和柠檬酸为增塑剂,以甘油为成膜助剂,添加中草药大黄与黄连提取成分制备可食性复合膜.研究了常温(温度25~28℃,相对湿度60%~75%)下该复合涂膜保鲜剂对鸡蛋品质及其生理生化变化的影响.结果表明：两配方组涂膜贮藏30 d 后,鸡蛋的失重率、相对密度、哈夫单位、蛋黄指数、pH 值和TVB-N等指标都优于对照组鸡蛋(CK),货架期延长,其中配方Ⅱ(苦豆子半乳甘露聚糖0.3%,甘油0.1%,CaCl20.2%,柠檬酸0.2%,大黄提取物25 mg/mL,黄连提取物15 mg/mL)涂膜处理保鲜贮藏效果最佳.%Study on eggs storage effects of compound coating antistaling agent of polysaccharide at room temperature (25~28 ℃)and relative humidity(60%~75%)were carried out in this paper.The an-tistaling agent was composed of Sophoraalopecuroides bean galactomannan for the coating matrix,glycerin and Chinese herbal medicine Coptis chinensis and Rheum palmatum extraction were added to improve the film flexibility CaCl2 and citric acid as film-forming additives.The results showed that after 30 days stor-age,compared with the control group at room temperature,the rate of weight loss of eggs,the relative den-sity,Hough unit,egg yolk index,pH value of egg and TVB-N value were all superior than those of control group,the shelf life was extended,and the best fresh-keeping and storage effect comes from the treatment by using the coating prescription Ⅱ.