QC Low [2 µg/ml]
Time Mean Accuracy% Stability %
0 hours 2.03 105  
100
99.5
12 hours 1.99 99.95 98
99.90
99.95
24 hours 1.98 99.90 97.5
99.95
99.85
QC High [12.8 µg/ml]
Time Mean Accuracy% Stability %
0 hours 12.75 99.66  
99.58
99.53
12 hours 12.61 98.13 98.9
98.36
98.98
24 hours 12.58 98.28 98.7
98.13
98.36
Table 2b: Freeze and Thaw Stability Data.