QC Low [2 µg/ml]
Time Mean Accuracy% Stability%
0 hour   1.99 98.72   98.50
97.25
97.74
30 days  1.96 100.50
98.91
98.50
QC High [12.8 µg/ml]
Time Mean Accuracy% Stability%
0 hour   97.89   99.68
97.51
97.35
30 days   96.95
97.27
97.81
Table 4: Long term stability data of pioglitazone in serum.