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Voltammetric and Impedimetric Detection of Norfloxacin at Co Nanoparticle Modified Polymer Composite Electrodes
Electroanalysis ( IF 2.7 ) Pub Date : 2020-10-29 , DOI: 10.1002/elan.202060423 Clementine J. Louw 1 , Siyabulela Hamnca 1 , Priscilla G. L. Baker 1
Electroanalysis ( IF 2.7 ) Pub Date : 2020-10-29 , DOI: 10.1002/elan.202060423 Clementine J. Louw 1 , Siyabulela Hamnca 1 , Priscilla G. L. Baker 1
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The measurement of antibiotics in environmental water systems is increasingly becoming a top priority for global environmental watchdog organisations, as the looming threat of emerging contaminants moves to centre stage. A novel chemical sensor based on polyamic acid (PAA) semiconducting polymer and cobalt nanoparticles (CoNP) was developed and used to demonstrate proof of concept evidence for measurement of norfloxacin at trace concentrations in aqueous systems. Polyamic acid and cobalt nanoparticles were both chemically synthesised and characterised using Fourier transform infrared spectroscopy, transmission electron microscopy, cyclic voltammetry and small angle x‐ray scattering. The polyamic acid and cobalt nanoparticles were electrodeposited onto screen printed carbon electrodes to produce novel composite sensors (SPCE/PAA/CoNP). The polymer composite chemical sensors were applied to the detection of norfloxacin in the micromolar concentration using square wave voltammetry, with a sensitivity of 18.0±6.59 μA/mM, calculated from the slope of the calibration curve and a limit of detection (LOD) of 0.979 ±0.419 mM, with LOD=3.3(Sy/S). The SPCE/PAA/CoNP sensor response to norfloxacin as measured by electrochemical impedance spectroscopy, yielded a sensitivity of 17.6±8.72 Ω/mM as and a limit of detection (LOD) of 0.228±0.0935 mM.
中文翻译：
钴纳米粒子修饰的聚合物复合电极对诺氟沙星的伏安和阻抗测定
随着新出现的污染物的迫在眉睫的威胁日益凸显，环境水系统中抗生素的检测正日益成为全球环境监管机构的头等大事。开发了一种基于聚酰胺酸（PAA）半导体聚合物和钴纳米颗粒（CoNP）的新型化学传感器，并将其用于证明概念证据，用于测量水性系统中痕量诺氟沙星。聚酰胺酸和钴纳米粒子都是化学合成的，并使用傅立叶变换红外光谱，透射电子显微镜，循环伏安法和小角度X射线散射进行表征。将聚酰胺酸和钴纳米颗粒电沉积到丝网印刷的碳电极上，以生产新型复合传感器（SPCE / PAA / CoNP）。聚合物复合化学传感器应用于方波伏安法测定微摩尔浓度的诺氟沙星，其灵敏度为18.0±6.59μA/ mM，由校准曲线的斜率和0.979的检出限（LOD）计算得出±0.419 mM，LOD = 3.3（Sy / S）。通过电化学阻抗谱测量，SPCE / PAA / CoNP传感器对诺氟沙星的响应产生的灵敏度为17.6±8.72Ω/检测限（LOD）为0.228±0.0935 mM。
更新日期：2020-12-01
中文翻译：
钴纳米粒子修饰的聚合物复合电极对诺氟沙星的伏安和阻抗测定
随着新出现的污染物的迫在眉睫的威胁日益凸显，环境水系统中抗生素的检测正日益成为全球环境监管机构的头等大事。开发了一种基于聚酰胺酸（PAA）半导体聚合物和钴纳米颗粒（CoNP）的新型化学传感器，并将其用于证明概念证据，用于测量水性系统中痕量诺氟沙星。聚酰胺酸和钴纳米粒子都是化学合成的，并使用傅立叶变换红外光谱，透射电子显微镜，循环伏安法和小角度X射线散射进行表征。将聚酰胺酸和钴纳米颗粒电沉积到丝网印刷的碳电极上，以生产新型复合传感器（SPCE / PAA / CoNP）。聚合物复合化学传感器应用于方波伏安法测定微摩尔浓度的诺氟沙星，其灵敏度为18.0±6.59μA/ mM，由校准曲线的斜率和0.979的检出限（LOD）计算得出±0.419 mM，LOD = 3.3（Sy / S）。通过电化学阻抗谱测量，SPCE / PAA / CoNP传感器对诺氟沙星的响应产生的灵敏度为17.6±8.72Ω/检测限（LOD）为0.228±0.0935 mM。
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