From: A novel stability-indicating method for known and unknown impurities profiling for diltiazem hydrochloride pharmaceutical dosage form (tablets)
Levels
Preparation
% Recovery
Mean
%RSD
LOQ
1
113.0
112.3
0.5
2
112.0
3
50%
98.0
97.3
0.6
97.0
100%
98.5
0.0
150%
98.1
0.2
98.3