| 项目 | 方法 |
| SS | Standard Method 2540 B&D |
| VSS | Standard Method 2540E |
| NH3-N | HACH Method 8038 Nessler Method |
| NO2-N | HACH Method 8507 Diazotization Method Powder Pillows or AccuVac® Ampuls |
| NO3-N | HACH Method 10020 Chromotropic Acid Method Test ‘N Tube™ Vials |
| TN | HACH Method 10072 Persulfate Digestion Method Test ‘N Tube™ Vials |