Voltammetric determination of oxytetracycline in milk and pharmaceuticals samples using polyurea modified glassy carbon electrode

Highly electroactive Co–ZnO/GO nanocomposite: Electrochemical sensing platform for oxytetracycline determination

“… Electrode Electrochemical technique Linear range Limit of detection References Ta2O5-ErGO/GCE CV 0.2–100 μM 0.095 μM [ 48 ] C-doped ZnO PEC 0.01–1000 nM 8.75 pM [ 49 ] DPA@CuNCs Fluorescence 5–60 μM 0.026 μM [ 50 ] AuNP@MIPs-CdTe QDs Fluorescence 0.1–3.0 μM 5.22 nM [ 51 ] MWCNTs-AuNPs/CS-AuNPs/rGO-AuNPs DPV 1–540 nM. 30pM [ 52 ] EPPU/GCE SWV 1–200 μM 1.01 × 10 −2 μM [ 53 ] B-CDs FL 0.33 μg/mL. 1.52–27.60 μg/mL [ 54 ] EDCA [ 4 ] SIE 2.3 × 10 −11 M. 10 −10 M to 10 −5 M [ 54 ] Co–ZnO/GO/ITO DPV 1 pM to 0.1 μM 0.16 pM Our work …”

Selective Determination of Norfloxacin in Pharmaceutical Formulations and Human Urine Samples Using Poly(8-aminonaphthaline-2-sulfonic Acid)-Modified Glassy Carbon Electrodes

“…The remarkable signal enhancement at the poly­(ANSA)/GCE as compared to the bare electrode might be due to the strong interaction of NFN with the poly­(ANSA)/GCE via hydrogen bonding between the amine (−NH 2 ) and carboxylic (−COOH) groups of the analyte with amine (−NH 2 ) and sulfonic groups (HSO 4 ) of the polymer. Besides, the π–π interaction between NFN and the polymer attributes the strong coupling that could enhance the reaction rate. , …”

“…Electrochemical Impedance Spectroscopic Characterization. Electrochemical impedance spectroscopy (EIS) is a promising technique to understand the electrochemical properties of the electrode surface, and the interface between the surface of the modified electrode and analyte, 21 was used to investigate the electrode modification and evaluate the electron conductivity of the material with which the GCE was modified. EIS spectra of both the bare GCE (curve a) and the modified GCE (curve b) in pH 7.0 PBS containing 10.0 mM of [Fe(CN) 6 ] 3−/4− and 0.1 M of KCl are shown in Figure 2B.…”

Development of an angle-adjustable photonic crystal fluorescence platform for sensitive detection of oxytetracycline

“…[13][14][15] To detect OTC efficiently, a plethora of analytical techniques have been explored and utilized for OTC detection. [16][17][18][19][20][21] Among these, fluorescence analysis is particularly notable for its simplicity, cost-effectiveness, rapidity, high sensitivity, and the convenience of visual inspection, thereby serving as a potent method for non-destructive online monitoring. 22 Nevertheless, the applications of fluorescence (FL) detection techniques often require the use of low-intensity excitation light and minute quantities of fluorophores to avert sample degradation.…”