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Pico-molar electrochemical detection of ciprofloxacin at composite electrodes
Analyst ( IF 3.6 ) Pub Date : 2022-07-12 , DOI: 10.1039/d2an00645f Vikram Singh 1 , Sabine Kuss 1
Analyst ( IF 3.6 ) Pub Date : 2022-07-12 , DOI: 10.1039/d2an00645f Vikram Singh 1 , Sabine Kuss 1
Affiliation
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Rapid determination of antibiotic residues is crucial for both environmental monitoring and the ecosystem. The presented study explores the development of a sensitive, selective, and highly reproducible chemical sensor to detect the antibiotic ciprofloxacin (Cip) in 0.1 M NaNO3 and in tap water. The designed sensor was constructed using oxygen functionalized carbon nanotubes (OCNTs), a layer of conductive polymer (polydopamine; PDA), and electro-deposited silver nanoparticles (Ag-NPs) at a glassy carbon electrode. Double-pulse electro-deposition was employed, as it offers numerous advantages including quick analysis time (s, ms), high reproducibility, and does not require expensive complexing agents, even at room temperature. The fabricated chemical sensor was fully optimized and characterized using physiochemical and electrochemical techniques, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and voltammetry. Electrochemical measurements demonstrate high applicability of the chemical sensor towards the detection of Cip in the pico-molar concentration range. Detection and quantification levels were determined and the stability of the sensor was assessed. The obtained results demonstrate the potential of the OCNTs-PDA-Ag sensor to detect Cip in environmental samples.
中文翻译：
复合电极上环丙沙星的皮摩尔电化学检测
抗生素残留的快速测定对于环境监测和生态系统都至关重要。本研究探索了一种灵敏、选择性和高度可重复的化学传感器的开发，以检测 0.1 M NaNO 3中的抗生素环丙沙星 (Cip)在自来水中。设计的传感器是使用氧功能化碳纳米管 (OCNT)、一层导电聚合物 (聚多巴胺; PDA) 和在玻璃碳电极上的电沉积银纳米粒子 (Ag-NP) 构建的。采用双脉冲电沉积，因为它具有许多优点，包括快速分析时间 (s, ms)、高重现性，并且即使在室温下也不需要昂贵的络合剂。使用扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、X 射线光电子能谱 (XPS) 和伏安法等物理化学和电化学技术对制造的化学传感器进行了全面优化和表征。电化学测量表明化学传感器对检测皮摩尔浓度范围内的 Cip 具有很高的适用性。确定检测和量化水平并评估传感器的稳定性。获得的结果证明了 OCNTs-PDA-Ag 传感器检测环境样品中 Cip 的潜力。
更新日期：2022-07-12
中文翻译：
复合电极上环丙沙星的皮摩尔电化学检测
抗生素残留的快速测定对于环境监测和生态系统都至关重要。本研究探索了一种灵敏、选择性和高度可重复的化学传感器的开发，以检测 0.1 M NaNO 3中的抗生素环丙沙星 (Cip)在自来水中。设计的传感器是使用氧功能化碳纳米管 (OCNT)、一层导电聚合物 (聚多巴胺; PDA) 和在玻璃碳电极上的电沉积银纳米粒子 (Ag-NP) 构建的。采用双脉冲电沉积，因为它具有许多优点，包括快速分析时间 (s, ms)、高重现性，并且即使在室温下也不需要昂贵的络合剂。使用扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、X 射线光电子能谱 (XPS) 和伏安法等物理化学和电化学技术对制造的化学传感器进行了全面优化和表征。电化学测量表明化学传感器对检测皮摩尔浓度范围内的 Cip 具有很高的适用性。确定检测和量化水平并评估传感器的稳定性。获得的结果证明了 OCNTs-PDA-Ag 传感器检测环境样品中 Cip 的潜力。
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