I. A. Abramov, S. I. Gainanova, L. R. Zagitova, V. N. Maistrenko
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引用次数: 0
Abstract
Antibacterial drugs have become an integral part of the food industry and agriculture in the present-day world. The presence of even trace amounts of antibiotics in foods of animal origin can lead to the development of allergic reactions and direct toxic effects in a human body. In this regard, it is necessary to create sensitive and selective procedures for determining antibacterial drugs in order to prevent their excessive consumption. In this work, a glassy carbon voltammetric sensor based on layer-by-layer deposited electroreduced graphene oxide and fullerene functionalized with S-N,N'-bis(1-phenylethyl)malonamide is proposed for the determination of levofloxacin (Lev, S-(-)-ofloxacin) by differential pulse voltammetry. The calibration graph is linear in two ranges, 1.0 × 10–6–6.0 × 10–5 M and 6.0 × 10–5–5.0 × 10–4 M Lev, with sensitivity coefficients of 107 and 58.0 μA/mM, respectively. The limit of detection and limit of quantification are 1.8 × 10–7 and 6.04 × 10–7 M, respectively. The selectivity of the sensor to Lev relative to some fluoroquinolone antibiotics: ciprofloxacin, lomefloxacin, and enrofloxacin, was assessed. The sensor was used to determine Lev in meat and milk using differential pulse voltammetry.
期刊介绍:
The Journal of Analytical Chemistry is an international peer reviewed journal that covers theoretical and applied aspects of analytical chemistry; it informs the reader about new achievements in analytical methods, instruments and reagents. Ample space is devoted to problems arising in the analysis of vital media such as water and air. Consideration is given to the detection and determination of metal ions, anions, and various organic substances. The journal welcomes manuscripts from all countries in the English or Russian language.