Accurate and quick judgement of the food quality can protect the legitimate rights of consumers. Currently, nanozymes are widely employed in the rapid detection of food due to their stability and economy. The contents of bisphenol A and antioxidant can be used to measure the quality of beverages. However, due to the complexity of the actual samples, it is still challenging to achieve the sensitive detection of both at the same time. The development of nanozyme with high enzyme activity is essential for sensitive detection of targets in complex foods. In this work, a novel nanomaterial (ZrTGA) was synthesized based on thioglycolic acid-modified Metal–Organic Framework (MOF-818). The interaction between Cu–S bonds and increase in the proportion of Cu resulted in ZrTGA exhibiting higher peroxidase-like and polyphenol oxidase-like activities. These enzyme activities were 317 % and 200 % of the original values, respectively. With high enzyme activity can sensitively detect two important indicators of bisphenol A and antioxidants in beverages. The increased enzyme activity of ZrTGA enabled the content of both substances to be detected by smartphone extraction of RGB. Finally, through the output of the ''0″ and ''1″ signals of the logic gates, it is possible to quickly determine the level of the two substances and thus directly assess the quality of the beverages. The modification of nanozyme enables the detection of substances at low concentrations based on enhancing dual-enzyme activity. The combination of mobile phone photography and logic gate technology enables the continuous detection of two important indicators in beverages, overcoming the limitations of traditional large-scale instruments. It also provides an alternative strategy for food quality detection.

中文翻译：

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受天然酶启发的改性金属有机框架 (MOF-818)，用于智能检测婴儿饮料中的总抗氧化剂和双酚 A


准确、快速判断食品质量，保障消费者合法权益。目前，纳米酶因其稳定性和经济性而被广泛应用于食品的快速检测。双酚A和抗氧化剂的含量可以用来衡量饮料的质量。然而，由于实际样品的复杂性，同时实现两者的灵敏检测仍然具有挑战性。开发具有高酶活性的纳米酶对于复杂食品中目标的灵敏检测至关重要。在这项工作中，基于巯基乙酸修饰的金属有机框架（MOF-818）合成了一种新型纳米材料（ZrTGA）。 Cu-S 键之间的相互作用和 Cu 比例的增加导致 ZrTGA 表现出更高的过氧化物酶和多酚氧化酶活性。这些酶活性分别是原始值的 317% 和 200%。具有较高的酶活性，可以灵敏地检测饮料中双酚A和抗氧化剂两个重要指标。 ZrTGA 酶活性的增加使得可以通过智能手机提取 RGB 来检测这两种物质的含量。最后，通过逻辑门的“0”和“1”信号的输出，可以快速确定两种物质的含量，从而直接评估饮料的质量。纳米酶的修饰可以在增强双酶活性的基础上实现低浓度物质的检测。手机摄影与逻辑门技术的结合，实现了饮料中两项重要指标的连续检测，克服了传统大型仪器的局限性。它还为食品质量检测提供了一种替代策略。