%0 Journal Article
%T STABILITY STUDY OF PRAVASTATIN UNDER HYDROLYTIC CONDITIONS ASSESSED BY HPLC
%A S BRAIN-ISASI
%A C REQUENA
%A A ¨˘LVAREZ-LUEJE
%J Journal of the Chilean Chemical Society
%D 2008
%I Sociedad Chilena de Qu¨Şmica
%X In this work an HPLC stability-indicating method was developed and applied to study the hydrolytic behavior of pravastatin in different pHs and temperatures. From the system suitability test, the selected chromatographic conditions were a C-18 column, acetonitrile-30 mmol L-1 phosphate buffer solution pH 2 (28:72) as mobile phase, 40ˇăC temperature column, a flux of 1 mL/min and 239 nm as wavelength detection. The developed method exhibited an adequate repeatability and reproducibility (CV 0.11% and 0.49%, respectively) and a recovery higher than 98%. Furthermore, the detection and quantitation limits were 3.4x10-7mol L-1 and 3.7xl0-6mol L-1. The kinetic degradation of pravastatin fits to a pseudo-first order kinetic. The degradation was pH-dependent: alkaline pH < acid pH and the generation of degradation products was dependent of the media tested (one product in alkaline medium and 4 products in acid medium). Activation energy, kinetic rate constants at different temperatures, t1/2 and t90 values are also reported.
%K HPLC
%K Stability
%K Hydrolysis
%K Pravastatin
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000400010