荧光
四环素
碳量子点
量子点
碲化镉光电
检出限
化学
碳纤维
抗生素
分析化学(期刊)
纳米技术
材料科学
色谱法
生物化学
物理
光学
复合数
复合材料
作者
Yao Fan,Lu Shen,Yaqi Liu,Ying Hu,Wanjun Long,Haiyan Fu,Yuanbin She
出处
期刊:Food Chemistry
[Elsevier]
日期:2023-04-12
卷期号:421: 136105-136105
被引量:18
标识
DOI:10.1016/j.foodchem.2023.136105
摘要
A ratiometric fluorescent probe based on N/S doped carbon dots (N/S-CQDs) and mercaptoacetic acid capped CdTe quantum dots (TGA-CdTe QDs) with sensitized and self-calibration functions was constructed to sensitively detect multiple tetracycline antibiotics (TCs). N/S-CQDs could attach stably to TGA-CdTe QDs and form a new composite ratiometric fluorescent probe that had a more than tenfold increase in sensitivity to TCs compared with each single QD. The probe could detect four common TCs as the color of the probe changed from bright red to dark red, and the limit of detection (LOD) was 1.47 × 10−2–1.78 × 10−2 mg/L. Practical applications of the probe in food and urine were also verified with recovery rates of 95.21%-104.97%. Due to the abundant spectral fingerprints provided by both QDs, this novel probe could accurately recognize not only different single TCs but also mixed TC samples even in actual samples combined with chemometrics.
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