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Ibrahim F, Elmansi H, Aboshabana R. Assessment of two analgesic drugs through fluorescence quenching of acriflavine as a new green methodology. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Orlandini S, Pasquini B, Caprini C, Del Bubba M, Squarcialupi L, Colotta V, Furlanetto S. A comprehensive strategy in the development of a cyclodextrin-modified microemulsion electrokinetic chromatographic method for the assay of diclofenac and its impurities: Mixture-process variable experiments and quality by design. J Chromatogr A 2016; 1466:189-98. [PMID: 27623066 DOI: 10.1016/j.chroma.2016.09.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 09/05/2016] [Accepted: 09/05/2016] [Indexed: 02/06/2023]
Abstract
A comprehensive strategy involving the use of mixture-process variable (MPV) approach and Quality by Design principles has been applied in the development of a capillary electrophoresis method for the simultaneous determination of the anti-inflammatory drug diclofenac and its five related substances. The selected operative mode consisted in microemulsion electrokinetic chromatography with the addition of methyl-β-cyclodextrin. The critical process parameters included both the mixture components (MCs) of the microemulsion and the process variables (PVs). The MPV approach allowed the simultaneous investigation of the effects of MCs and PVs on the critical resolution between diclofenac and its 2-deschloro-2-bromo analogue and on analysis time. MPV experiments were used both in the screening phase and in the Response Surface Methodology, making it possible to draw MCs and PVs contour plots and to find important interactions between MCs and PVs. Robustness testing was carried out by MPV experiments and validation was performed following International Conference on Harmonisation guidelines. The method was applied to a real sample of diclofenac gastro-resistant tablets.
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Affiliation(s)
- S Orlandini
- Department of Chemistry "U. Schiff", University of Florence, Via U. Schiff 6, 50019, Sesto Fiorentino, Florence, Italy.
| | - B Pasquini
- Department of Chemistry "U. Schiff", University of Florence, Via U. Schiff 6, 50019, Sesto Fiorentino, Florence, Italy
| | - C Caprini
- Department of Chemistry "U. Schiff", University of Florence, Via U. Schiff 6, 50019, Sesto Fiorentino, Florence, Italy
| | - M Del Bubba
- Department of Chemistry "U. Schiff", University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Florence, Italy
| | - L Squarcialupi
- Department of Neuroscience, Psychology, Drug Research and Child Health, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Via U. Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - V Colotta
- Department of Neuroscience, Psychology, Drug Research and Child Health, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Via U. Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - S Furlanetto
- Department of Chemistry "U. Schiff", University of Florence, Via U. Schiff 6, 50019, Sesto Fiorentino, Florence, Italy.
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Rapid Determination of Uric Acid in Human Urine by CE with an Improved Electromagnetic Induction Detector. Chromatographia 2014. [DOI: 10.1007/s10337-014-2807-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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UV spectrophotometric simultaneous determination of paracetamol and ibuprofen in combined tablets by derivative and wavelet transforms. ScientificWorldJournal 2014; 2014:313609. [PMID: 24949492 PMCID: PMC3950367 DOI: 10.1155/2014/313609] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Accepted: 10/31/2013] [Indexed: 12/02/2022] Open
Abstract
The application of first-order derivative and wavelet transforms to UV spectra and ratio spectra was proposed for the simultaneous determination of ibuprofen and paracetamol in their combined tablets. A new hybrid approach on the combined use of first-order derivative and wavelet transforms to spectra was also discussed. In this application, DWT (sym6 and haar), CWT (mexh), and FWT were optimized to give the highest spectral recoveries. Calibration graphs in the linear concentration ranges of ibuprofen (12–32 mg/L) and paracetamol (20–40 mg/L) were obtained by measuring the amplitudes of the transformed signals. Our proposed spectrophotometric methods were statistically compared to HPLC in terms of precision and accuracy.
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Two new electrochemical methods for fast and simultaneous determination of codeine and diclofenac. Talanta 2013; 116:1026-32. [PMID: 24148511 DOI: 10.1016/j.talanta.2013.08.020] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Revised: 08/08/2013] [Accepted: 08/13/2013] [Indexed: 11/23/2022]
Abstract
In this paper, we present two new electrochemical methods for fast and simultaneous determination of codeine (CO) and diclofenac (DCF). The first one is based on batch injection analysis with amperometric detection (BIA-MPA) and the second one is based on capillary electrophoresis with capacitively coupled contactless conductivity detection (CE-C(4)D). The proposed BIA-MPA method is highly-precise (RSD of 1.1% and 0.9% for DCF and CO, respectively; n=10), fast (300 injections h(-1)) and has low detection limits (1.1 and 1.0 µmol L(-1) for DCF and CO, respectively). The proposed CE-C(4)D method allows the determination of CO and DFC in less than 1 min with high precision (RSD of 0.3% and 0.7% for DCF and CO, respectively; n=10) and low detection limits (11 and 21 µmol L(-1) for DCF and CO, respectively). Both proposed methods were applied to the determination of CO and DCF in pharmaceutical samples with similar results to those achieved by high-performance liquid chromatography (HPLC) at a 95% confidence level.
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