食品四环素检测新策略:木香精油碳点的制备与应用
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国家自然科学基金青年科学基金项目(No.32301512);大学生创新训练计划项目(No.X202410637019,No.X202410637020);新疆轻工职业技术学院校级课题(No.XJQG2024008))


A New Strategy for the Detection of Tetracycline in Food: Preparation and Application of Carbon Point of Essential Oil of Woody
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    摘要:

    为实现食品中四环素类抗生素(tetracyclines,TCs)的快速检测,提出了一种基于木香精油碳点(wood essential oil carbon dots,WCDs)的荧光探针检测方法。以木香精油为原料,采用油浴法一步合成了具有蓝色荧光的WCDs,研究了WCDs对TCs的检测性能及检测机理,并在8种食品样品中验证了WCDs荧光探针的可行性。结果显示:WCDs的最佳激发波长和最佳发射波长分别为370、440 nm;在磷酸盐缓冲溶液为溶剂、45 ℃孵育30 min条件下,WCDs荧光探针对质量浓度范围为0.05~5.0 μg·mL-1的TCs表现出良好的线性关系(R2=0.999 5),检出限为0.036 41 μg·mL-1; TCs诱导WCDs荧光猝灭源于荧光共振能量转移和聚集诱导猝灭的协同作用;对8种食品样品中TCs进行检测后计算得出TCs加标回收率为94.0%~106.4%、相对标准偏差为1.2%~2.7%。上述结果提示WCDs荧光探针在快速检测TCs方面具有很高的选择性、灵敏度和可行性,为食品中TCs的检测提供了新的思路与策略。

    Abstract:

    To achieve rapid detection of tetracycline antibiotics (TCs) in food, a fluorescence probe method based on wood essential oil carbon dots (WCDs) was developed. Blue-fluorescent WCDs were synthesized via a one-step oil bath method using wood essential oil as the raw material. The detection performance and mechanism of WCDs toward TCs were investigated, and the feasibility of the WCDs-based fluorescence probe was validated in eight food samples. Results indicated that the optimal excitation and emission wavelengths of WCDs were 370 nm and 440 nm, respectively. Under optimized conditions using phosphate buffer as solvent, with incubation at 45 ℃ for 30 min, the WCDs probe exhibited a strong linear response to TCs within the concentration range of 0.05~5.0 μg·mL -1 (R2=0.999 5), and a detection limit of 0.036 41 μg·mL -1. The fluorescence quenching of WCDs induced by TCs was attributed to the synergistic effects of fluorescence resonance energy transfer and aggregation-caused quenching. Spike recovery tests in eight food samples yielded recoveries of 94.0%~106.4% with relative standard deviations of 1.2%~2.7%. These findings demonstrate that the WCDs fluorescence probe possesses high selectivity, sensitivity, and practical applicability for rapid TCs detection, offering a novel strategy for monitoring TCs in food.

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张茂,张志强,周悦,张磊.食品四环素检测新策略:木香精油碳点的制备与应用[J].重庆师范大学学报自然科学版,2025,42(5):119-128

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  • 在线发布日期: 2025-12-16