作者
Anderson Martin Santos, Ademar Wong, Fernando Henrique Cincotto, Fernando Cruz Moraes, Orlando Fatibello-Filho
发表日期
2019/3
期刊
Microchimica Acta
卷号
186
页码范围
1-10
出版商
Springer Vienna
简介
A glassy carbon electrode was modified with carbon black and CdTe quantum dots in a chitosan film to obtained a sensor for norfloxacin (NOR) in the presence of dopamine, caffeine, and uric acid. The morphological, structural and electrochemical characteristics of the nanostructured material were evaluated using spectrophotometry, X-ray diffraction, transmission electronic microscopy and voltammetry. The high electrochemical activity, fast electron transfer rate and high surface area enhanced the oxidation peak currents and shifted the peak potentials of NOR for more negative values (typically at 0.95 V vs. Ag/AgCl). Electrochemical determination of NOR was carried out using square-wave adsorptive anodic stripping voltammetry (SWAdASV). Response is linear in the 0.2 to 7.4 μmol L−1 NOR concentration range, and the detection limit is as low as 6.6 nmol L−1. The method was successfully applied to …
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AM Santos, A Wong, FH Cincotto, FC Moraes… - Microchimica Acta, 2019