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Spectrometric method for the assay of ramipril using molybdophosphoric acid
Mădălina Vieriu1, Nela Bibire, Gladiola Tântaru
1University of Medicine and Pharmacy Grigore T Popa lasi, Faculty of Pharmacy.
Unlabelled:
Ramipril is a drug of the angiotensin converting enzyme inhibitor class.
Aim:
A new molecular absorbance spectrometric method was developed for the assay of ramipril using molybdophosphoric acid in acidic medium.
Material And Methods:
The reaction product showed a maximum absorbance at 361 nm. The optimum conditions of the reaction were established. The developed method was validated.
Results:
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.
Conclusions:
The proposed method is simple, easy to perform, sensitive, linear, precise, accurate and robust.
