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Rubenick JB, Rubim AM, Bellé F, Nogueira-Librelotto DR, Rolim CMB. Preparation of mupirocin-loaded polymeric nanocapsules using essential oil of rosemary. BRAZ J PHARM SCI 2017. [DOI: 10.1590/s2175-97902017000116101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Tôrres AR, Grangeiro S, Fragoso WD. Multivariate control charts for monitoring captopril stability. Microchem J 2015. [DOI: 10.1016/j.microc.2014.07.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Rubim AM, Rubenick JB, Laporta LV, Rolim CMB. A simple method for the quantification of diclofenac potassium in oral suspension by high-performance liquid chromatography with UV-detection. BRAZ J PHARM SCI 2013. [DOI: 10.1590/s1984-82502013000300021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A rapid, simple and low cost method was developed to determine diclofenac potassium (DP) in oral suspension, using a reverse-phase column (C8, 150 mm x 4.6 mm, 5 µm), mobile phase containing methanol/buffer phosphate (70:30 v/v, pH 2.5), at a flow rate of 1.0 mL/min, isocratic method, and ultraviolet detection at 275 nm. A linear response (r = 1.0000) was observed in the range of 10.0-50.0 µg/mL. Validation parameters such as linearity, specificity, precision, accuracy and robustness were evaluated. The method presented precision (repeatability: relative standard deviation = 1.21% and intermediate precision: between-analyst = 0.85%). The specificity of the assay was evaluated by exposure of diclofenac potassium under conditions of stress such as hydrolysis, photolysis, oxidation and high temperature. The method presented accuracy values between 98.28% and 101.95%. The results demonstrate the validity of the proposed method that allows determination of diclofenac potassium in oral suspension and may be used as an alternative method for routine analysis of this product in quality control.
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Nogueira R, Garrido BC, Borges RM, Silva GEB, Queiroz SM, Cunha VS. Development of a new sodium diclofenac certified reference material using the mass balance approach and ¹H qNMR to determine the certified property value. Eur J Pharm Sci 2012; 48:502-13. [PMID: 23220339 DOI: 10.1016/j.ejps.2012.11.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 11/08/2012] [Accepted: 11/13/2012] [Indexed: 11/18/2022]
Abstract
Certified reference materials (CRMs) are essential tools to guarantee the metrological traceability of measurement results to the International System of Units (SI), which means the accuracy and comparability of results over time and space. In the pharmaceutical area, only a few CRMs are available and the use of (non-certified) reference materials is a much more common practice. In this paper, the studies on a new candidate CRM of sodium diclofenac based on the ISO Guides 34:2009 and 35:2005 are described. The project steps included characterization, homogeneity test, stability studies, and uncertainties estimation. In the characterization, the mass fractions of organic, inorganic, and volatile impurities were determined, and the results were cross-checked by independent reference methods or interlaboratorial study. The API mass fraction was calculated by mass balance and cross-checked by quantitative proton nuclear magnetic resonance (¹H qNMR). The paper also presents a Monte Carlo simulation to estimate the measurement uncertainty as an approach to validate the GUM results in ¹H qNMR. The homogeneity between batch units was verified, and the candidate CRM stability under transport and storage conditions was evaluated in short- and long-term stability studies. The CRM certified property value and corresponding expanded uncertainty, obtained from the combined standard uncertainty multiplied by the coverage factor (k=2), for a confidence level of 95%, was (999.76+0.10) mg g⁻¹.
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Affiliation(s)
- Raquel Nogueira
- National Institute of Metrology, Quality, and Technology (Inmetro), Chemical Metrology Division (Dquim), Av. Nossa Senhora das Graças, 50, Xerém, 25250-020 Rio de Janeiro, RJ, Brazil.
| | - Bruno C Garrido
- National Institute of Metrology, Quality, and Technology (Inmetro), Chemical Metrology Division (Dquim), Av. Nossa Senhora das Graças, 50, Xerém, 25250-020 Rio de Janeiro, RJ, Brazil
| | - Ricardo M Borges
- Rio de Janeiro Federal University, Natural Products Research Center (NPPN), Brazil
| | - Gisele E B Silva
- National Institute of Metrology, Quality, and Technology (Inmetro), Chemical Metrology Division (Dquim), Av. Nossa Senhora das Graças, 50, Xerém, 25250-020 Rio de Janeiro, RJ, Brazil
| | - Suzane M Queiroz
- National Institute of Metrology, Quality, and Technology (Inmetro), Chemical Metrology Division (Dquim), Av. Nossa Senhora das Graças, 50, Xerém, 25250-020 Rio de Janeiro, RJ, Brazil
| | - Valnei S Cunha
- National Institute of Metrology, Quality, and Technology (Inmetro), Chemical Metrology Division (Dquim), Av. Nossa Senhora das Graças, 50, Xerém, 25250-020 Rio de Janeiro, RJ, Brazil
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