Electrochemical study of mefexamide at glassy-carbon electrodes and its determination in urine by differential pulse voltammetry

Simultaneous Voltammetric Determination of Theophylline and Guaifenesin Using a Multiwalled Carbon Nanotube‐Ionic Liquid Modified Glassy Carbon Electrode

“…The plot of peak potential versus pH ( Figure 3B,D) showed straight lines between 4.0-10.0 (y = À0.017x + 1.284) and 2.0-8.0 (y = À0.054x + 1.305) for GF and TP, respectively (R 2 > 0.98). This is in consistent with previous reports [26][27][28].…”

Electrochemical studies of tamsulosin hydrochloride using multiwalled carbon nanotube-modified glassy carbon sensor

“…The anodic oxidative behaviour of TAM may be due to oxidation of alkoxybenzene [24,25]. The alkoxybenzene is converted into quinone by undergoing a 2e 2 , 2 H + oxidation as explained in Fig.…”

Identification of 5-aminosalicylic acid, ciprofloxacin and azithromycin by abrasive stripping voltammetry

“…Within an interval 1 < pH < 10, the peak potentials are independent of pH in both techniques. According to the literature data [26,29], it is not known which part of ciprofloxacin molecule is oxidized in the electrode reaction but it can be assumed that it is one of three amino groups that is oxidized to the cation radical [31][32][33][34][35][36][37]. This reaction is followed by the fast and totally irreversible transformation of the molecule either by the dimerization [31,33], or by the reaction with water [34][35][36][37].…”

“…The origin of the first peak is not known, but the main peak is ascribed to the oxidation of dimethy- lamino group on the desosamine sugar part of the molecule [27]. The product of this electrode reaction is cation radical, which undergoes irreversible transformation by the reaction with water [31][32][33][34][35][36][37]. This attribution is based on the fact that erythromycin, which is structurally analogous but has no nitrogen atom in macrocyclic lactone ring, exhibits similar voltammetric response [38].…”