Spectrometric method for the assay of ramipril using molybdophosphoric acid
Vieriu, M.ăd.ăl.; Bibire, N.; Tântaru, G.; Apostu, M.; Panainte, A.D.; Dorneanu, V.
Revista Medico-Chirurgicala a Societatii de Medici Si Naturalisti Din Iasi 116(4): 1218-1222
2012
ISSN/ISBN: 0048-7848 PMID: 23700915 Document Number: 663047
Ramipril is a drug of the angiotensin converting enzyme inhibitor class. A new molecular absorbance spectrometric method was developed for the assay of ramipril using molybdophosphoric acid in acidic medium. The reaction product showed a maximum absorbance at 361 nm. The optimum conditions of the reaction were established. The developed method was validated. The method showed a good linearity in the range of 8 - 36 microg/ml (correlation coefficient r = 0.9996). The detection limit (LD) was 0.86microg/ml and the quantification limit (LQ) 2.88 pg/ml. Precision and accuracy were determined (RSD = 1.15%); mean recovery was 98.90% in the 97.13-101.03% concentration range. The proposed method is simple, easy to perform, sensitive, linear, precise, accurate and robust.