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Determination of Diclofenac Sodium in Eagle's Minimum Essential Medium with Earle's Balanced Salt Solution

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A validated method was developed for determination of diclofenac sodium, considered a model hydrophilic drug for in vitro permeation studies, in Eagle's Minimum Essential Medium (MEM) with Earle's balanced salt solution. Liquid chromatography was used to determine diclofenac sodium. This method was developed with a reversed-phase column Supercosil LC 18, DB 25 cm × 4.5 mm; the mobile phase was methanol with 3% (v/v) acetic acid–Milli-Q water (74 + 26), and detection was at 283 nm. The detection and quantitation limits were 2.41 × 10–8 and 3.31 × 10–5 μg/μL, respectively. The accuracy within-day (n = 3) and day-to-day (n = 7) was 98.83%; the mean variation coefficient for inter- (n = 7) and intraday precision (n = 3) was 12.20%, thus, not exceeding 15%. This method can be used as an analytical procedure for the determination of diclofenac sodium in MEM for in vitro permeation studies.
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Document Type: Research Article

Affiliations: 1: Faculty of Pharmaceutical Sciences Oswaldo Cruz, R. Brigadeiro Galvão 540, 01151-000, São Paulo, SP, Brazil 2: University of São Paulo, Faculty of Pharmaceutical Sciences, Departament of Pharmacy, Av. Prof. Lineu Prestes 580, 05508-900, São Paulo, SP, Brazil 3: University of São Paulo, Institute of Chemistry, Av. Prof. Lineu Prestes 748, 05508-800, São Paulo, Brazil

Publication date: 2003-07-01

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  • The Journal of AOAC INTERNATIONAL publishes refereed papers and reviews in the fields of chemical, biological and toxicological analytical chemistry for the purpose of showcasing the most precise, accurate and sensitive methods for analysis of foods, food additives, supplements and contaminants, cosmetics, drugs, toxins, hazardous substances, pesticides, feeds, fertilizers and the environment available at that point in time. The scope of the Journal includes unpublished original research describing new analytical methods, techniques and applications; improved approaches to sampling, both in the field and the laboratory; better methods of preparing samples for analysis; collaborative studies substantiating the performance of a given method; statistical techniques for evaluating data. The Journal will also publish other articles of general interest to its audience, e.g., technical communications; cautionary notes; comments on techniques, apparatus, and reagents.
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