کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7143279 | 1462057 | 2016 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fluorescence turn-on strategy based on silver nanoclusters-Cu2+ system for trace detection of quinolones
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
Herein, utilizing fluorescent Ag nanoclusters (Ag NCs) capped by polyethyleneimine (PEI) with different molecular weights, we constructed a novel Ag NCs-Cu2+ sensing system based on fluorescence turn-on strategy for trace detection of quinolones, including nalidixic acid, cinoxacin, ciprofloxacin/ofloxacin, and moxifloxacin; these were the representatives of four generations of quinolone antibacterial drugs. The fluorescence of Ag NCs could be efficiently quenched by Cu2+, while with the addition of quinolones, the fluorescence of this system recovered rapidly. This protocol exhibited excellent sensitivities to these five quinolones. For instance, the linear ranges were from 1 to 100Â nM for nalidixic acid with limit of detection (LOD) 0.47Â nM, from 1 to 80Â nM for cinoxacin with LOD 0.43Â nM, from 0.1 to 120Â nM for ciprofloxacin with LOD 38Â pM, from 0.1 to 80Â nM for ofloxacin with LOD 49Â pM, and from 0.1 to 120Â nM for moxifloxacin with LOD 48Â pM, respectively, revealing that this approach showed low detection limits and wide linear ranges. Benefiting from the high sensitivity, the satisfactory recoveries were obtained for trace detection of quinolones in real samples, such as tablets, human urine and serum.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 234, 29 October 2016, Pages 338-344
Journal: Sensors and Actuators B: Chemical - Volume 234, 29 October 2016, Pages 338-344
نویسندگان
Beibei Mao, Fei Qu, Shuyun Zhu, Jinmao You,