Showing papers by "Juan A. Squella published in 1990"
TL;DR: The results show that nitrendipine remains unaltered in the short time scale of a normal analytical procedure and no special care with visible light exposure is necessary, however nitrenderipine is strongly altered with UV irradiation showing a first-order degradation kinetics.
28 citations
TL;DR: In this paper, a differential pulse voltammetric method for the determination of famotidine in pharmaceutical preparations is described, based on electrochemical oxidation of Famotidine at a glassy carbon or platinum electrode.
Abstract: A differential pulse voltammetric method for the determination of famotidine in pharmaceutical preparations is described. The method is based on electrochemical oxidation of famotidine at a glassy carbon or platinum electrode. The proposed method shows good reproducibility, and sample preparation is simple.
19 citations
TL;DR: In this paper, the authors applied the polarographic technique to a study of the photodegradation process of some calcium antagonists of the dihydropyridine family, and the degradation kinetics due to three light exposure conditions are reported.
11 citations
TL;DR: In this article, a new differential pulse polarographic method for the determination of buspirone pharmaceutical formulations is proposed, which is based on the CN bond electroactivity of the pirimidinic ring and sample preparation is easy, and no excipient separation is required.
Abstract: A new differential pulse polarographic method for the determination of buspirone pharmaceutical formulations is proposed. The method is based on the CN bond electroactivity of buspirone pirimidinic ring. Recovery study and content uniformity test are described. Adequate precision and accuracy were obtained. Sample preparation is easy, and no excipient separation is required.
6 citations