Validation and Uncertainty Estimation of an Ecofriendly and Stability-Indicating HPLC Method for Determination of Diltiazem in Pharmaceutical Preparations
Figure 3
Typical chromatograms of (a) diltiazem working standard solution (10 μg/mL) and after degradation under (b) heat condition; (c) acidic hydrolysis; (d) basic hydrolysis; (e) oxidative condition: peak 3: hydrogen peroxide, peak 4: oxidative impurity; (f) photolytic condition: peak 1: diltiazem, peak 2: desacetyldiltiazem.