基于智能凝胶标签的鲜切网纹瓜新鲜度无损监测  

An Intelligent Gel Label for Non-destructive Monitoring of the Freshness of Fresh-Cut Netted Melon

作　　者：荣丽岩 蒋东华[1] 李丽[1] 汪艳群[1] 张爽 马艺超 杨舒涵 李月新 吴朝霞[1] RONG Liyan;JIANG Donghua;LI Li;WANG Yanqun;ZHANG Shuang;MA Yichao;YANG Shuhan;LI Yuexin;WU Zhaoxia(College of Food Science,Shenyang Agricultural University,Shenyang 110866,China;Institute of Agricultural Quality Standards and Testing Technology,Liaoning Academy of Agricultural Sciences,Shenyang 110866,China)

机构地区：[1]沈阳农业大学食品学院,辽宁沈阳110866 [2]辽宁省农业科学院农业质量标准与检测技术研究所,辽宁沈阳110866

出　　处：《食品科学》2024年第1期239-246,共8页Food Science

基　　金：辽宁省应用基础研究计划项目(2022JH2/101300177)。

摘　　要：以卡拉胶、羧甲基纤维素钠和黄原胶为基质材料,溴百里香酚蓝(bromothymol blue,BTB)作为显色指示剂,复配一种新型凝胶状智能标签,用于鲜切网纹瓜新鲜度的实时监测。智能凝胶标签颜色随包装内CO_(2)浓度变化,由蓝色逐渐转变为黄绿色、黄褐色和橙黄色,从而反映鲜切网纹瓜的新鲜度。使用扫描电子显微镜、衰减全反射-傅里叶变换红外光谱、X射线衍射仪和热重分析仪对凝胶标签的形态和结构进行表征。结果表明,加入羧甲基纤维素钠和黄原胶未改变凝胶标签的微观结构,三者具有良好的相容性,同时凝胶标签的热稳定性随着BTB的加入得到提高。凝胶标签在4℃和25℃贮藏时,凝胶标签保持出色的颜色稳定性,将其用于鲜切网纹瓜4℃贮藏时,凝胶标签的颜色显示出明显的颜色变化。相关性分析表明凝胶标签色差值与包装中的CO_(2)浓度、鲜切网纹瓜的pH值和菌落总数均有显著相关性。该标签具有出色的pH值敏感性,可以作为监测鲜切网纹瓜新鲜度的有效方法。In this study,a novel intelligent gel label for the real-time monitoring of the freshness of fresh-cut netted melon was fabricated using carrageenan,sodium carboxymethylcellulose and xanthan gum as the matrix materials and bromothymol blue(BTB)as the chromogenic indicator.The color of the gel label changed from blue to yellow-green,yellow-brown and orange-yellow according to the CO_(2) concentration inside the package,which could reflect the freshness of fresh-cut netted melon.The morphology and structure of the gel label were characterized using scanning electron microscopy(SEM),attenuated total reflection-Fourier transform infrared(ATR-FTIR)spectroscopy,X-ray diffraction(XRD)and thermogravimetry(TG).The results showed the microstructure of the gel labels did not change with the addition of sodium carboxymethylcellulose and xanthan gum,which indicated the three components were well compatible,while the thermal stability of the gel label was improved with the addition of BTB.The gel label showed excellent color stability during storage at 4 or 25℃and its color changed obviously with the storage of fresh-cut netted melon at 4℃.The correlation analysis showed a significant correlation between the label’s color difference and the CO_(2) concentration in the package as well as the pH and total aerobic plate counts of fresh-cut netted melon.This gel label had excellent pH sensitivity and thus could be used as an effective method for monitoring the freshness of fresh-cut netted melon.

关 键 词：智能凝胶标签 鲜切网纹瓜 新鲜度 无损监测 

分 类 号：TS206.4[轻工技术与工程—食品科学]