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Identification and determination of selected medicines reducing hypertension by densitometric and gas chromatographic
K Czerwińska1, E Wyszomirska, T Kaniewska
1Department of Basic and Applied Pharmacy, Drug Institute, Warsaw, Poland.
Abstract:
Conditions have been elaborated for the identification and quantitative determination of captopril and enalapril in pharmaceutical preparations by the densitometric method in the concentration range 5-50 microg, and of enalapril by gas chromatography in the concentration range 0.5-3.5 mg/ml. The separation of the preparations was performed using methanol. In the densitometric method the determination of captopril was done at lambda = 212 nm, while for enalapril at lambda = 210 nm. In the gas chromatographic method a DB-17 capillary column was used as well as a flame ionization detector. Perindopril was used as the internal standard.
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