| Si | ||||
| Serial number | Recommended value | Analysis value | Absolute error | Relative error (%) |
| A1 | 1.702 | 1.690 | −0.007 | −0.410 |
| A4 | 2.839 | 2.848 | 0.003 | 0.110 |
| A5 | 1.328 | 1.328 | −0.010 | −0.710 |
| A6 | 1.383 | 1.395 | 0.009 | 0.620 |
| Ave | 1.567 | 1.579 | 0.007 | 0.469 |