氧氟沙星
胶体金
介电谱
纳米材料
循环伏安法
电极
材料科学
电化学气体传感器
石墨烯
电化学
选择性
纳米颗粒
核化学
分析化学(期刊)
化学
色谱法
纳米技术
有机化学
催化作用
生物化学
物理化学
环丙沙星
抗生素
作者
Rebeca Montenegro Santana da Silva,Anderson M. Santos,Ademar Wong,Fernando C. Moraes,Orlando Fatibello‐Filho,Marco Antônio dos Santos Farias
出处
期刊:Analytical Methods
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:14 (39): 3859-3866
被引量:2
摘要
A new electrode was prepared based on functionalized graphene and gold nanoparticles dispersed in a chitosan film. Such an electrochemical sensor determines ofloxacin in the presence of dopamine, paracetamol, and caffeine. Characterization (morphological and electrochemical) was done using scanning electron microscopy, electrochemical impedance spectroscopy, and cyclic voltammetry. The sensor design improved the analytical signal, the electrochemical activity, and the electron transfer rate. Ofloxacin was determined by square-wave voltammetry, with a linear concentration range of 0.10-4.9 μmol L-1 (r = 0.999, LOD = 12 nmol L-1). The proposed sensor showed good repeatability and selectivity and was applied successfully to the determination of ofloxacin in pharmaceutical formulations, synthetic urine, and water river samples. The proposed method proved to be excellent; therefore, it is an alternative method for the determination of ofloxacin.
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