苏木色素-滤纸指示标签的制备及其对猪肉新鲜度的监测  

Preparation of Sappanwood Pigment/Filter Paper Indicator Label and Its Application in Monitoring Pork Freshness

作　　者：赵洪喜 周景廉 尹兆京 余祥英 ZHAO Hongxi;ZHOU Jingian;YIN Zhaojing;YU Xiangying(School of Life and Health Technology,Dongguan University of Technology,Guangdong Dongguan 523808,China)

机构地区：[1]东莞理工学院生命健康技术学院,广东东莞523808

出　　处：《包装工程》2024年第19期190-198,共9页Packaging Engineering

基　　金：国家自然科学基金(32202011);广东省创新强校创新团队项目(2021KCXTD035);东莞理工学院大学生创新创业训练计划(S202311819132)。

摘　　要：目的以天然色素苏木色素为pH指示剂,制备一种可视化监测猪肉新鲜度的指示标签,并探究其实际应用效果。方法以苏木色素提取液为指示剂,以定性滤纸为载体制备指示标签。利用比色分析和氨敏感性分析,测试表征标签的指示性能,并进一步将指示标签应用于猪肉的新鲜度监测。结果比色分析结果显示标签在pH4~12范围内会随着pH的增大逐渐由黄色变为暗红色,颜色变化明显;氨敏感性分析结果表明,氨水浓度越高,则标签变色越显著,且变色速度越快。猪肉新鲜度监测实验结果表明,随着猪肉腐败程度的加深,指示标签的颜色由黄色变为暗红色,颜色变化明显,且标签的ΔE与猪肉的pH、挥发性盐基氮(TVB-N)含量呈良好的线性关系(R2分别为0.9897、0.9163),可用于猪肉新鲜度的监测。结论以天然色素苏木色素为pH指示剂、以定性滤纸为载体可构建一种基于色差变化或色差变化时间来监测肉制品新鲜度的指示标签,研究结果可为构建新型天然色素类食品新鲜度指示标签提供参考。The work aims to prepare a visual indicator label for monitoring pork freshness and explore its practical application with natural pigment from sappanwood as pH indicator.The indicator label was prepared with the pigment from sappanwood as indicator and qualitative filter paper as carrier.Colorimetric analysis and ammonia sensitivity analysis were conducted to test the indicating performance of the label,and the label was further applied in monitoring the pork freshness.Colorimetric analysis showed that the label changed obviously from yellow to dark red with the increase of pH value in the range of 4-12.Ammonia sensitivity analysis showed that the higher the ammonia concentration,the more significant and faster the color of the label changed.The application of the label in monitoring pork freshness showed that,with the deepening of pork corruption,the color of indicator label changed obviously from yellow to dark red,theΔE value of the label showed a good linear relationship with pH value and volatile nitrogen(TVB-N)content of pork(R2=0.9897 and 0.9163,respectively),which could be used for monitoring pork freshness.With the natural pigment from sappanwoood as pH indicator and qualitative filter paper as carrier,an indicator label for monitoring the freshness of pork products could be constructed based on chromatic change or time required for the color change.The results of this study could provide reference for the construction of new natural pigment of indicator label for monitoring food freshness.

关 键 词：苏木色素 滤纸 指示标签 比色分析 氨敏感性分析 猪肉新鲜度 

分 类 号：TB332[一般工业技术—材料科学与工程]