| Sample | g/L [U] | 2xSE (95%) |
| 1 | 0.998 | 0.100 |
| 2 | 0.793 | 0.072 |
| 3 | 0.902 | 0.064 |
| 4 | 0.853 | 0.030 |
| 5 | 1.070 | 0.052 |
| 6 | 0.843 | 0.128 |
| 7 | 0.967 | 0.050 |
| 8 | 0.898 | 0.114 |
| 9 | 1.055 | 0.122 |
| 10 | 0.810 | 0.090 |
| 11 | 0.825 | 0.082 |
| 12 | 0.969 | 0.034 |
| Mean | 0.915 | 0.190 |