科研之友
微信
新浪微博
Facebook
分享链接
摘要
A simple, accurate, precise and sensitive method using CD for separation and stability indicating assay of enantiomers of amlodipine in the commercial tablets has been established. Several types of CD were evaluated and best results were obtained using a fused-silica capillary with phosphate running buffer (100 mM, pH 3.0) containing 5 mM hydroxypropyl-alpha-CD. The method has shown adequate separation for amlodipine enantiomers from its degradation products. The drug was subjected to oxidation, hydrolysis, photolysis and heat to apply stress conditions. The range of quantitation for both enantiomers was 5-150 mu g/mL. Intra- and inter-day RSD (n = 6) was <4%. The limit of quantification that produced the requisite precision and accuracy was found to be 5 mu g/mL for both enantiomers. The LOD for both enantiomers was found to be 0.5 mu g/mL. Degradation products produced as a result of stress studies did not interfere with the detection of enantiomers and the assay can thus be considered stability indicating.
- 出版日期2008-11
