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Mithra K, Jena SS. Surfactant head group and concentration influence on structure and dynamics of gellan gum hydrogels: Crossover from stretched to compressed exponential. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- K Mithra
- Department of Physics and Astronomy National Institute of Technology Rourkela Odisha India
| | - Sidhartha S Jena
- Department of Physics and Astronomy National Institute of Technology Rourkela Odisha India
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Investigation of counterion effects of transition metal cations (Fe3+, Cu2+, Zn2+) on cetrimonium bromide using cyclic voltammetry. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113599] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Guzmán MF, Mendoza Huizar LH, Galán Vidal CA, Morales GR, Álvarez Romero GA. A Box-Behnken Optimized Methodology for the Quantification of Diclofenac using a Carbon Paste-Multiwalled Carbon Nanotubes Electrode. CURR ANAL CHEM 2019. [DOI: 10.2174/1573411014666180423151749] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Diclofenac is a widely used nonsteroidal anti-inflammatory drug. Recent
studies have shown that frequent consumption of this drug in high concentrations can cause heart diseases,
so strict control of diclofenac’s quantity in commercial drugs is necessary. This paper presents
the development of an optimized voltammetric methodology for the quantification of diclofenac,
which offers some advantages over other electrochemical and accepted methods.
Objective:
Optimize with a Box-Behnken design the differential pulse voltammetry parameters towards
the quantification of diclofenac in pharmaceutical samples.
Methods:
Diclofenac behavior in the working electrode was evaluated by cyclic voltammetry, in order
to stablish the best conditions for diclofenac’s quantification. A Box-Behnken design was then used to
optimize the differential pulse voltammetry parameters and stablish the analytical behavior of the proposed
methodology. Commercial tablets were prepared for analysis according to the Pharmacopeia,
the DPV optimized methodology was used to quantify diclofenac in the samples, and the results were
statistically compared with those obtained with the official methodology.
Results:
After optimization, the analytical parameters found were: correlation coefficient of 0.998, detection
limit of 0.001 µM, quantification limit of 0.0033 µM and sensitivity of 0.299 µA.µM-1. The
statistical analysis showed there were no significant differences between the results obtained with the
proposed methodology and those obtained with the official methodology.
Conclusion:
The statistical analysis showed that the proposed methodology is as reliable as the official
spectrophotometric one for the quantification of diclofenac in commercial drugs, with very competitive
analytical parameters, and even better to others found with more complex electrodes.
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Affiliation(s)
- Miriam Franco Guzmán
- Universidad Autonoma del Estado de Hidalgo, Area Academica de Quimica, Carretera Pachuca-Tulancingo Km 4.5. C.P 42184, Mineral de la Reforma, Hidalgo, Mexico
| | - Luis Humberto Mendoza Huizar
- Universidad Autonoma del Estado de Hidalgo, Area Academica de Quimica, Carretera Pachuca-Tulancingo Km 4.5. C.P 42184, Mineral de la Reforma, Hidalgo, Mexico
| | - Carlos Andrés Galán Vidal
- Universidad Autonoma del Estado de Hidalgo, Area Académica de Quimica, Carretera Pachuca-Tulancingo Km 4.5. C.P 42184, Mineral de la Reforma, Hidalgo, Mexico
| | - Gabriela Roa Morales
- UAEM-UNAM, Centro Conjunto de Investigacion en Quimica Sustentable, Carretera Km. 14.5, Unidad San Cayetano, 50200, Toluca - Atlacomulco, Toluca de Lerdo, Mex, Mexico
| | - Giaan A. Álvarez Romero
- Universidad Autonoma del Estado de Hidalgo, Area Academica de Quimica, Carretera Pachuca-Tulancingo Km 4.5. C.P 42184, Mineral de la Reforma, Hidalgo, Mexico
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