High enrichment and sensitive measurement of oxytetracycline in tea drinks by thermosensitive magnetic molecular imprinting based magnetic solid phase extraction coupled with boron doped carbon dots

检出限 土霉素 色谱法 固相萃取 分子印迹聚合物 化学 碳量子点 洗脱 微量 选择性 材料科学 纳米技术 抗生素 量子点 生物化学 医学 替代医学 催化作用 病理
作者
Zhi Li,Shuangying Li,Liushan Jiang,Jingwen Niu,Yue Zhang,Linchun Nie,Qingxiang Zhou,Chunmao Chen
出处
期刊:Food Chemistry [Elsevier]
卷期号:447: 138998-138998 被引量:4
标识
DOI:10.1016/j.foodchem.2024.138998
摘要

As a typical kind of new pollutants, there are still some challenges in the rapid detection of antibiotics. In this work, a sensitive fluorescent probe based on boron-doped carbon dots (B-CDs) in combination with thermo-responsive magnetic molecularly imprinted polymers (T-MMIPs) was constructed for the detection of oxytetracycline (OTC) in tea drinks. T-MMIPs were designed, fabricated and employed to enrich OTC at trace level from tea drinks, and B-CDs were utilized as the fluorescent probe to detect the concentration of OTC. The proposed method exhibited good linear relationship with OTC concentration from 0.2 to 60 μg L−1 and the limit of detection was 0.1 μg L−1. The established method has been successfully validated with tea beverages. Present work was the first attempt application of T-MMIPs in combination with CDs in detection of OTC, and demonstrated that the proposed method endowed the detection of OTC with high selectivity, sensitivity, reliability and wide application prospect, meanwhile offered a new strategy for the method establishment of rapid and sensitive detection of trace antibiotics in food and other matrices.
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