The study investigates a bimetallic organic framework (Zn/Eu-MOF) based fluorescent probe for visual detection of ofloxacin (OFL) in pork, beef and fish. The developed sensing probe recognizes OFL through internal filtration and cation-π interaction between OFL and Zn/Eu-MOF, resulting in a distinct color change from orange-red to light green. The content of OFL can be determined through RGB analysis by a mobile-phone. The developed sensing probe offers several advantages such as broad linear range (0.1 ∼ 80 μM), rapid response time (30 s), low detection line (0.44 μM). The effectiveness of the sensing probe can last for five rounds with good recovery. Moreover, the application of the sensing probe on pork, beef and fish samples are reliable, with recoveries ranging from 93.4 to 112.1%, and the relative standard deviations (RSD) within 1.17% to 2.06%. These results suggest that the developed sensing probe could have significant potential for practical on-site test in food.

该研究调查了一种基于双金属有机骨架 (Zn/Eu-MOF) 的荧光探针，用于视觉检测猪肉、牛肉和鱼中的氧氟沙星 (OFL)。开发的传感探针通过内部过滤和 OFL 与 Zn/Eu-MOF 之间的阳离子-π 相互作用识别 OFL，从而导致从橙红色到浅绿色的明显颜色变化。OFL 的内容可以通过手机的RGB 分析来确定。开发的传感探头具有线性范围宽（0.1∼80 μM）、快速响应时间（30 s）、低检测线（0.44 μM）等优点。感应探头的效能可以持续五轮，恢复良好。此外，该传感探针在猪肉、牛肉和鱼肉样品上的应用可靠，回收率在93.4%至112.1%之间，相对标准偏差（RSD）在1.17%至2之间。06%。这些结果表明，所开发的传感探头在食品实际现场测试中具有巨大的潜力。