Abstract:In this approach, a new voltammetric method for determination of norfloxacin was proposed with high sensitivity and wider detection linear range. The used voltammetric sensor was fabricated simply by coating a layer of graphene oxide (GO) and Nafion composited film on glassy carbon electrode. The advantage of proposed method was sensitive electrochemical response for norfloxacin, which was attributed to the excellent electrical conductivity of GO and the accumulating function of Nafion under optimum experiment… Show more
“…Comparison of the fabricated sensor with reported sensors for NFX determination. the performance of MWCNT-CPE/pRGO-ANSA/Au with previously reported electrochemical sensors [2,3,13,[36][37][38]. This proposed MWCNT-CPE/pRGO-ANSA/Au sensor shows either lower detection limit [2,3,13,37,38] or relatively broad linear rang [2,3,13,[36][37][38] for NFX determination, except for device simplicity.…”
Section: Tablementioning
confidence: 62%
“…the performance of MWCNT-CPE/pRGO-ANSA/Au with previously reported electrochemical sensors [2,3,13,[36][37][38]. This proposed MWCNT-CPE/pRGO-ANSA/Au sensor shows either lower detection limit [2,3,13,37,38] or relatively broad linear rang [2,3,13,[36][37][38] for NFX determination, except for device simplicity. In addition, the proposed sensor was successfully applied in both pharmaceutical formulations and plasma samples.…”
“…Comparison of the fabricated sensor with reported sensors for NFX determination. the performance of MWCNT-CPE/pRGO-ANSA/Au with previously reported electrochemical sensors [2,3,13,[36][37][38]. This proposed MWCNT-CPE/pRGO-ANSA/Au sensor shows either lower detection limit [2,3,13,37,38] or relatively broad linear rang [2,3,13,[36][37][38] for NFX determination, except for device simplicity.…”
Section: Tablementioning
confidence: 62%
“…the performance of MWCNT-CPE/pRGO-ANSA/Au with previously reported electrochemical sensors [2,3,13,[36][37][38]. This proposed MWCNT-CPE/pRGO-ANSA/Au sensor shows either lower detection limit [2,3,13,37,38] or relatively broad linear rang [2,3,13,[36][37][38] for NFX determination, except for device simplicity. In addition, the proposed sensor was successfully applied in both pharmaceutical formulations and plasma samples.…”
“…The reason could be attributed to the negative charge of Nafion®, which blocked the diffusion of ferrocyanide and ferricyanide towards the electrode surface, and thus completely hindering the electron and mass transfer. This was due to the electrostatic (negative charge) repulsive effects between Nafion® and [Fe(CN)6]3−/4− [[37],[38],[39]], with no well-defined peak in cyclic voltammetry experiments for Nafion®/GCE there was defined peak as shown inFig. 2.…”
The influence of functionalized multi-walled carbon nanotubes (fMWCNT) in the presence of 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF) in different ratios was investigated on the acetaminophen (ACOP) electrochemical determination. The electrochemical behavior of the ACOP exhibited a pair of well-defined redox peaks, suggesting that the reversibility of ACOP was significantly improved in comparison to irreversible oxidation peak on bare GCE. The redox process was controlled by adsorption, involves two electrons and the value of apparent rate constant (k) was equal to 14.7 s ± 3.6 s. The analytical curves were obtained for concentrations of ACOP ranging from 0.3 to 3.0 μmol L. The values of the detection limit were calculated from SWV and found to be 6.73 × 10 mol L. The proposed electrochemical sensor exhibited good stability and reproducibility and was applied for ACOP determination in tablets (Tylenol® and Tylenol®DC) with satisfactory results.
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