HPLC Determination of Naphthalene Amino Derivatives Using Electrochemical Detection at Carbon Paste Electrodes

2007 ◽  
Vol 19 (2-3) ◽  
pp. 185-190 ◽  
Author(s):  
Jiri Zima ◽  
Hana Dejmkova ◽  
Jiri Barek
Keyword(s):  
Electrochemical Detection ◽  
Hplc Determination ◽  
Carbon Paste ◽  
Carbon Paste Electrodes ◽  
Amino Derivatives

scholarly journals Polyvinyl Chloride Modified Carbon Paste Electrodes for Sensitive Determination of Levofloxacin Drug in Serum, Urine, and Pharmaceutical Formulations

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3150
Author(s):  
Fatehy M. Abdel-Haleem ◽  
Sonia Mahmoud ◽  
Nour Eldin T. Abdel-Ghani ◽  
Rasha Mohamed El Nashar ◽  
Mikhael Bechelany ◽  
...  
Keyword(s):  
Bacterial Infections ◽  
Pharmaceutical Preparation ◽  
Pharmaceutical Formulations ◽  
Selectivity Coefficient ◽  
Pvc Membrane ◽  
Carbon Paste ◽  
Serum Samples ◽  
Carbon Paste Electrodes ◽  
Antibiotic Drug

Levofloxacin (LF) is a medically important antibiotic drug that is used to treat a variety of bacterial infections. In this study, three highly sensitive and selective carbon paste electrodes (CPEs) were fabricated for potentiometric determination of the LF drug: (i) CPEs filled with carbon paste (referred to as CPE); (ii) CPE coated (drop-casted) with ion-selective PVC membrane (referred to as C-CPE); (iii) CPE filled with carbon paste modified with a plasticizer (PVC/cyclohexanone) (referenced as P-CPE). The CPE was formulated from graphite (Gr, 44.0%) and reduced graphene oxide (rGO, 3.0%) as the carbon source, tricresyl phosphate (TCP, 47.0%) as the plasticizer; sodium tetrakis[3,5-bis(trifluoromethyl)phenyl] borate (St-TFPMB, 1.0%) as the ion exchanger; and levofloxacinium-tetraphenylborate (LF-TPB, 5.0%) as the lipophilic ion pair. It showed a sub-Nernstian slope of 49.3 mV decade−1 within the LF concentration range 1.0 × 10−2 M to 1.0 × 10−5 M, with a detection limit of 1.0 × 10−5 M. The PVC coated electrode (C-CPE) showed improved sensitivity (in terms of slope, equal to 50.2 mV decade−1) compared to CPEs. After the incorporation of PVC paste on the modified CPE (P-CPE), the sensitivity increased at 53.5 mV decade−1, indicating such improvement. The selectivity coefficient (log KLF2+,Fe+3pot.) against different interfering species (Na+, K+, NH4+, Ca2+, Al3+, Fe3+, Glycine, Glucose, Maltose, Lactose) were significantly improved by one to three orders of magnitudes in the case of C-CPE and P-CPE, compared to CPEs. The modification with the PVC membrane coating significantly improved the response time and solubility of the LF-TPB within the electrode matrix and increased the lifetime. The constructed sensors were successfully applied for LF determination in pharmaceutical preparation (Levoxin® 500 mg), spiked urine, and serum samples with high accuracy and precision.

Determination of meloxicam in plasma samples using a highly selective and sensitive voltammetric sensor based on carbon paste electrodes modified by molecularly imprinted polymer nanoparticle–multiwall carbon nanotubes

2015 ◽  
Vol 7 (4) ◽  
pp. 1280-1292 ◽  
Author(s):  
Saman Azodi-Deilami ◽  
Ebadullah Asadi ◽  
Majid Abdouss ◽  
Fardin Ahmadi ◽  
Alireza Hassani Najafabadi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwall Carbon Nanotubes ◽  
Voltammetric Sensor ◽  
Plasma Samples ◽  
Carbon Paste ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Carbon Paste Electrodes ◽  
Multiwall Carbon

A highly selective voltammetric sensor for the determination of meloxicam using a MIP@MWCNT–CPE is introduced.

Determination of chloramphenicol by differential pulse voltammetry at carbon paste electrodes – The use of sodium sulfite for removal of oxygen from electrode surface

2011 ◽  
Vol 76 (5) ◽  
pp. 383-397 ◽  
Author(s):  
Ferenc T. Pastor ◽  
Hana Dejmková ◽  
Jiří Zima ◽  
Jiří Barek
Keyword(s):  
Differential Pulse Voltammetry ◽  
Glassy Carbon ◽  
Sodium Sulfite ◽  
Differential Pulse ◽  
Optimal Conditions ◽  
Carbon Paste ◽  
Tricresyl Phosphate ◽  
Carbon Paste Electrodes ◽  
Pulse Voltammetry

The possibility of determination of chloramphenicol by differential pulse voltammetry at four different carbon paste electrodes, in the full pH range (2–12) of Britton–Robinson (BR) buffer was investigated. Electrodes were prepared by mixing spectroscopic graphite powder or glassy carbon microbeads with mineral oil (Nujol) or tricresyl phosphate. Under optimal conditions (BR buffer pH 12, the electrode prepared from glassy carbon microbeads and tricresyl phosphate), linear calibration graph was obtained only in 10–5 M chloramphenicol concentration range. Determination of lower concentrations of chloramphenicol was complicated by irreproducible peak of oxygen from the carbon paste which overlapped with peak of chloramphenicol. Addition of sodium sulfite removed the oxygen peak without influence on the peak of chloramphenicol. Under optimal conditions (electrode paste made from glassy carbon microbeads, BR buffer pH 10 and 0.5 M sodium sulfite), straight calibration line was obtained in the 10–6 and 10–5 M chloramphenicol concentration range. Limit of determination was 5 × 10–7 mol/l.

Cathodic Stripping Voltammetric Determination of Doxazosin in Urine and Pharmaceutical Tablets Using Carbon Paste Electrodes

The Analyst ◽  
1997 ◽  
Vol 122 (8) ◽  
pp. 849-854 ◽  
Author(s):  
Adela Arranz ◽  
Susana Fernández de Betoño ◽  
José M. Moreda ◽  
Adolfo Cid ◽  
Juan F. Arranz
Keyword(s):  
Voltammetric Determination ◽  
Carbon Paste ◽  
Pharmaceutical Tablets ◽  
Carbon Paste Electrodes ◽  
Cathodic Stripping

HPLC Determination of Nimesulide in Tablets by Electrochemical Detection

1998 ◽  
Vol 31 (7) ◽  
pp. 1173-1184 ◽  
Author(s):  
A. Álvarez-Lueje ◽  
P. Vásquez ◽  
L. J. Núñez-Vergara ◽  
J. A. Squella
Keyword(s):  
Electrochemical Detection ◽  
Hplc Determination

Carbon paste electrodes modified with Bi 2 O 3 as sensors for the determination of Cd and Pb

2002 ◽  
Vol 374 (6) ◽  
pp. 1155-1158 ◽  
Author(s):  
Rasa Pauliukaite ◽  
Radovan Metelka ◽  
Ivan Švancara ◽  
Agnieszka Królicka ◽  
Andrzej Bobrowski ◽  
...  
Keyword(s):  
Carbon Paste ◽  
Carbon Paste Electrodes

Utilization of Carbon Paste Electrodes for the Voltammetric Determination of Chlortoluron

2013 ◽  
Vol 25 (6) ◽  
pp. 1529-1534 ◽  
Author(s):  
Hana Dejmkova ◽  
Lucie Houskova ◽  
Jiri Barek ◽  
Jiri Zima
Keyword(s):  
Voltammetric Determination ◽  
Carbon Paste ◽  
Carbon Paste Electrodes
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