检出限
恩诺沙星
荧光
猝灭(荧光)
巯基乙酸
线性范围
量子点
化学
材料科学
分析化学(期刊)
色谱法
纳米技术
光学
有机化学
生物化学
物理
抗生素
环丙沙星
作者
Fang Yang,Bingbing Yang,Xinyue Gu,Minghua Li,Kezhen Qi,Yan Yao
标识
DOI:10.1016/j.saa.2023.122985
摘要
Water-soluble AgInS2 (AIS) quantum dots (QDs) were successfully prepared through the one-pot water phase method with thioglycolic acid (TGA) as the stabilizing agent. Because enrofloxacin (ENR) effectively quenches the fluorescence of AIS QDs, a highly-sensitive fluorescence detection method is proposed to detect ENR residues in milk. Under optimal detection conditions, there was a good linear relationship between the relative fluorescence quenching amount (ΔF/F0) of AgInS2 with ENR and ENR concentration (C). The detection range was 0.3125–20.00 μg/mL, r = 0.9964, and the detection limit (LOD) was 0.024 μg/mL (n = 11). The average recovery of ENR in milk ranged from 95.43 to 114.28%. The method established in this study has advantages including a high sensitivity, a low detection limit, simple operation and a low cost. The fluorescence quenching mechanism of AIS QDs with ENR was discussed and the dynamic quenching mechanism of light-induced electron transfer was proposed.
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