Food freshness monitoring is an important component in ensuring food safety for consumers and the food industry. Therefore, there is an urgent need for a portable, low-cost, and efficient detection method to determine the freshness. In this study, polyvinyl alcohol (PVA) was used as polymer carrier to prepare electrospinning film containing curcumin (Cur) and gardenia blue (GB) as intelligent indicator label on food packaging for real-time nondestructive detection of freshness of shrimp. The detection limit of ammonia response is less than or equal to 20 ppm, and the detection time is about 1 min, indicating that it has a sensitive response effect. At the same time, a smartphone application that can identify amines in response to color changes has been developed, and consumers can understand freshness by scanning the label. This study demonstrates the huge potential of smart indicator labels for food freshness monitoring.

中文翻译：

---

基于胺响应智能手机的便携式智能聚乙烯醇薄膜，用于实时检测虾的新鲜度

食品新鲜度监测是确保消费者和食品行业食品安全的重要组成部分。因此，迫切需要一种便携式、低成本、高效的新鲜度检测方法。本研究以聚乙烯醇（PVA）为聚合物载体，制备含有姜黄素（Cur）和栀子蓝（GB）的静电纺丝薄膜，作为食品包装上的智能指示标签，用于实时无损检测虾的新鲜度。氨响应的检测限小于等于20 ppm，检测时间约为1 min，表明其具有灵敏的响应效果。同时，一款可以根据颜色变化识别胺的智能手机应用程序已经开发出来，消费者可以通过扫描标签了解新鲜度。这项研究证明了智能指示标签在食品新鲜度监测方面的巨大潜力。