Browsing by Author "Tassara, Andrés"
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Simultaneous determination of ascorbic acid and acetylsalicylic acid in pharmaceutical formulations Toral Ponce, María; Lara Henríquez, Nelson; Richter Duk, Pablo; Tassara, Andrés; Tapia, A. E.; Rodríguez, C. (AOAC INTERNATIONAL, 2001-02)A direct, simple, and practical first-derivative spectrophotometric method is described for simultaneous determination of ascorbic acid and acetylsalicylic acid. The effects of the solvent, excipients, and spectral variables ...
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Toral Ponce, María; Tassara, Andrés; Soto Salazar, César; Richter Duk, Pablo (AOAC INTERNATIONAL, 2003-03)A simple and fast method was developed for the simultaneous determination of dapsone and pyrimethamine by first-order digital derivative spectrophotometry. Acetonitrile was used as a solvent to extract the drugs from the ...