Abstract
研究并构建了一种新型CdTe量子点"开关",利用量子点荧光强度的变化进行痕量诺氟沙星的检测。考察了不同缓冲溶液,pH值,Co2+浓度等因素对体系的影响。结果表明,在pH=10的硼砂缓冲液中,Co2+能猝灭CdTe的荧光;体系中加入诺氟沙星后,CdTe的荧光得到恢复,并且量子点荧光的恢复强度与诺氟沙星的浓度与呈良好的线性关系。基于量子点"开关"技术,通过检测CdTe荧光恢复强度,建立了一种测定诺氟沙星的方法。方法的线性范围为0.8×10^-8~4.4×10^-7 mol/L;检出限为2.3×10^-9 mol/L。应用于实际样品的检测,RSD≤2.2%(n=6),回收率为98.4%~102.1%,结果令人满意。
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More From: CHINESE JOURNAL OF ANALYTICAL CHEMISTRY (CHINESE VERSION)
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