A Simple Approach to Simultaneous Electroanalytical Quantification of Acetaminophen and Tramadol Using a Boron‐doped Diamond Electrode in the Existence of Sodium Dodecyl Sulfate

2019 ◽  
Vol 32 (2) ◽  
pp. 429-436 ◽  
Author(s):  
Oruç Yunusoğlu ◽  
Shabnam Allahverdiyeva ◽  
Yavuz Yardım ◽  
Zühre Şentürk
2012 ◽  
Vol 31 (2) ◽  
pp. 195 ◽  
Author(s):  
Sachin Saxena ◽  
Ratnanjali Shrivastava ◽  
Soami P. Satsangee

The electrochemical behavior of the asthma drug doxofylline was studied at a boron-doped diamond electrode in BR buffer (pH 3.8) by square-wave voltammetry. Cyclic voltammetry revealed the oxidation of doxofylline as an irreversible diffusion-controlled process. The oxidation mechanism was proposed and the drug was studied in the presence of solubilized systems like Tween-20 (T-20), sodium dodecyl sulfate (SDS), Triton X-100 (TTN), dioxane (DO), dimethylformamide (DMF), diethyl ether (DEE), benzene and methanol (MeOH). Comparison of the current responses in the solution system explained the sensitivity of the boron-doped diamond electrode (BDDE) with a three-fold increase in the current value compared to that of a glassy carbon electrode (GCE) at a fixed concentration of doxofylline. Peak current values varied linearly with increasing concentration and the LOD and LOQ were found to be 3.48 and 10.56 µg/ml, respectively. This method was employed to investigate doxofylline in the pharmaceutical formulation.


2020 ◽  
Vol 85 (7) ◽  
pp. 923-937
Author(s):  
Ertuğrul Keskin ◽  
Shabnam Allahverdiyeva ◽  
Esma Şeyho ◽  
Yavuz Yardim

The present work describes the electroanalytical investigation and a novel voltammetric method for the cheap, fast and simple quantification of tramadol (TRH) using a boron-doped diamond electrode. TRH displayed one well-defined, irreversible and adsorption-controlled oxidation peak at about 1.58 V (vs. Ag/AgCl) in Britton?Robinson buffer (BR, 0.1 mol L-1, pH 3.0) using the cyclic voltammetry technique. The voltammetric responses of the oxidation peaks are dependent on pH and their sensitivity was significantly enhanced in the presence of surfactant media (sodium dodecyl sulphate, SDS). Under the optimized experiment conditions, employing the square-wave stripping mode, it was found that there was an excellent correlation between oxidation peak current and the TRH concentration in the range 0.25 to 50.0 ?g mL-1 (8.34?10-7?1.67?10-4 mol L-1), with a detection limit of 0.072 ?g mL-1 (2.40?10-7 mol L-1) in 0.1 mol L-1 BR buffer (pH 3.0) solution comprising 8?10-4 mol L-1 SDS at 1.52 V (after 30 s accumulation at open-circuit conditions). The developed approach could be used for the quantification of TRH in pharmaceutical formulations and spiked human urine samples with acceptable recoveries.


2013 ◽  
Vol 25 (7) ◽  
pp. 1734-1741 ◽  
Author(s):  
Ana Paula Pires Eisele ◽  
Débora Nóbile Clausen ◽  
César Ricardo Teixeira Tarley ◽  
Luiz Henrique Dall'Antonia ◽  
Elen Romão Sartori

2013 ◽  
Vol 39 ◽  
pp. 41-46 ◽  
Author(s):  
Polyana Fernandes Pereira ◽  
Mariana Cardoso Marra ◽  
Amanda Barbosa Lima ◽  
Wallans Torres Pio dos Santos ◽  
Rodrigo Alejandro Abarza Munoz ◽  
...  

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Armando Vázquez ◽  
Lucía Alvarado ◽  
Isabel Lázaro ◽  
Roel Cruz ◽  
José Luis Nava ◽  
...  

2-(Thiocyanomethylthio)-benzothiazole (TCMTB) is used as fungicide in the paper, tannery, paint, and coatings industries, and its study is important as it is considered toxic to aquatic life. In this study, a comparison of direct anodic oxidation (AO) using a boron-doped diamond electrode (BDD) and electro-Fenton (EF) processes for TCMTB degradation in acidic chloride and sulfate media using a FM01-LC reactor was performed. The results of the electrolysis processes studied in the FM01-LC reactor showed a higher degradation of TCMTB with the anodic oxidation process than with the electro-Fenton process, reaching 81% degradation for the former process versus 47% degradation for the latter process. This difference was attributed to the decrease in H2O2 during the EF process, due to parallel oxidation of chlorides. The degradation rate and current efficiency increased as a function of volumetric flow rate, indicating that convection promotes anodic oxidation and electro-Fenton processes. The results showed that both AO and EF processes could be useful strategies for TCMTB toxicity reduction in wastewaters.


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