Table 8: Results of the evaluation of the stability of quality controls.
|
Quality control measures |
Short-term stability |
Freeze–thaw cycles |
||||||
|
3 h (22-25) °C |
6 h (22- 25) °C |
6 days (2-8) °C |
1 |
2 |
3 |
4 |
5 |
|
|
A405nm NC |
0.058 |
0.057 |
0.057 |
0.054 |
0.056 |
0.055 |
0.057 |
0.057 |
|
CPA/NC |
16.7 |
16.0 |
18.0 |
18.8 |
17.4 |
18.4 |
17.7 |
17.8 |
|
CPB/NC |
4.12 |
4.17 |
4.29 |
4.42 |
4.17 |
3.92 |
4.04 |
4.02 |
Confidence intervals (99%) of quality controls: A405nmNC ≤ 0.098; 2.28 ≤ LQC/NC ≤ 5.68; 7.13 ≤ HQC/NC ≤ 20.5; Values represent the means of three replications.