| by adding 20% | 4 | manner |
| for total phosphorus analysis | 3 | purpose |
| immediately | 2 | manner |
| sample → be → acidified | 24 |
| sample → be acidified to → ph | 10 |
| negative | neutral | positive |
| 0.136 | 0.827 | 0.037 |
| Raw frequency | 34 |
| Normalized frequency | 0.330 |
| Modifier score | 1.000 |
| Perplexity | 446.474 |