Test No. | Factors | Results of pH value | |||||||||
A | B | C | D | E | F | G | Before sterilization | After the accelerated tests | ΔpH value | ||
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 4.85 | 3.67 | −1.18 | |
2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 5.60 | 6.44 | 0.84 | |
3 | 1 | 3 | 3 | 3 | 3 | 3 | 3 | 6.31 | 7.21 | 0.90 | |
4 | 2 | 1 | 1 | 2 | 2 | 3 | 3 | 7.28 | 7.38 | 0.10 | |
5 | 2 | 2 | 2 | 3 | 3 | 1 | 1 | 5.35 | 5.79 | 0.44 | |
6 | 2 | 3 | 3 | 1 | 1 | 2 | 2 | 5.91 | 6.59 | 0.68 | |
7 | 3 | 1 | 2 | 1 | 3 | 2 | 3 | 5.95 | 4.20 | −1.75 | |
8 | 3 | 2 | 3 | 2 | 1 | 3 | 1 | 6.39 | 6.79 | 0.40 | |
9 | 3 | 3 | 1 | 3 | 2 | 1 | 2 | 4.73 | 4.93 | 0.20 | |
10 | 1 | 1 | 3 | 3 | 2 | 2 | 1 | 5.47 | 4.20 | −1.27 | |
11 | 1 | 2 | 1 | 1 | 3 | 3 | 2 | 6.38 | 7.04 | 0.66 | |
12 | 1 | 3 | 2 | 2 | 1 | 1 | 3 | 5.17 | 6.28 | 1.11 | |
13 | 2 | 1 | 2 | 3 | 1 | 3 | 2 | 6.86 | 5.57 | −1.29 | |
14 | 2 | 2 | 3 | 1 | 2 | 1 | 3 | 4.83 | 5.34 | 0.51 | |
15 | 2 | 3 | 1 | 2 | 3 | 2 | 1 | 5.79 | 6.60 | 0.81 | |
16 | 3 | 1 | 3 | 2 | 3 | 1 | 2 | 4.97 | 3.85 | −1.12 | |
17 | 3 | 2 | 1 | 3 | 1 | 2 | 3 | 5.96 | 6.30 | 0.34 | |
18 | 3 | 3 | 2 | 1 | 2 | 3 | 1 | 7.14 | 7.97 | 0.83 | |
| 0.177 | −1.085 | 0.155 | −0.042 | 0.010 | −0.007 | 0.005 |
| |||
| 0.208 | 0.532 | 0.030 | 0.357 | 0.202 | −0.058 | −0.005 |
| |||
| −0.183 | 0.755 | 0.017 | −0.113 | −0.010 | 0.267 | 0.202 |
| |||
R | 0.391 | 1.840 | 0.138 | 0.470 | 0.212 | 0.325 | 0.207 |
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