skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices

Development and validation of alternative methods by non-aqueous acid-base titration and derivative ultraviolet spectrophotometry for quantification of sildenafil in raw material and tablets

Silva, Taízia Dutra; Toledo, Cibele Rodrigues; Vianna-Soares, Cristina Duarte

Brazilian Journal of Pharmaceutical Sciences; Vol. 53 No. 1 (2017); e15181-

Universidade de São Paulo. Faculdade de Ciências Farmacêuticas 2017-01-01

Acesso online

  • Título:
    Development and validation of alternative methods by non-aqueous acid-base titration and derivative ultraviolet spectrophotometry for quantification of sildenafil in raw material and tablets
  • Autor: Silva, Taízia Dutra; Toledo, Cibele Rodrigues; Vianna-Soares, Cristina Duarte
  • Assuntos: Sildenafil Citrate; Vasodilator; Derivative Ultraviolet Spectrophotometry; Non-Aqueous Acid-Base Titrimetry; Sildenafil Citrate/Quality Control
  • É parte de: Brazilian Journal of Pharmaceutical Sciences; Vol. 53 No. 1 (2017); e15181-
  • Descrição: Sildenafil citrate (SILC) is a potent phosphodiesterase-5 inhibitor used for erectile dysfunction and pulmonary hypertension. This study shows two simple, fast and alternative analytical methods for SILC determination by non-aqueous titration and by derivative ultraviolet spectrophotometry (DUS) in active pharmaceutical ingredient and/or dosage forms. The quantitation method of SILC active pharmaceutical ingredient by non-aqueous acid-base titration was developed using methanol as solvent and 0.1 mol/L of perchloric acid in acetic acid as titrant. The endpoint was potentiometrically detected. The non-aqueous titration method shows satisfactory repeatability and intermediate precision (RSD 0.70-1.09%). The neutralization reaction occurred in the stoichiometric ratio 1:1 in methanol. The determination of SILC active pharmaceutical ingredient or dosage forms by DUS was developed in the linear range from 10 to 40 µg/mL, in 0.01 mol/L HCl, using the first order zero-peak method at λ 256 nm. The DUS method shows selectivity toward tablets excipients, appropriate linearity (R2 0.9996), trueness (recovery range 98.86-99.30%), repeatability and intermediate precision in three concentration levels (RSD 1.17-1.28%; 1.29-1.71%, respectively). Therefore, the methods developed are excellent alternatives to sophisticated instrumental methods and can be easily applied in any pharmaceutical laboratory routine due to simple and fast executions.
  • Títulos relacionados: https://www.revistas.usp.br/bjps/article/view/131419/127799
  • Editor: Universidade de São Paulo. Faculdade de Ciências Farmacêuticas
  • Data de criação/publicação: 2017-01-01
  • Formato: Adobe PDF
  • Idioma: Inglês
Links
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.