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| Item | Measure methods | Instrument |
|---|---|---|
| NH4+–N | Nessler's reagent method | |
| NO2−–N | N-1-Naphthyl-ethylenediamine method | Spectrophotometer |
| TN | Digestion of potassium persulfate | (WFJ 2100) |
| DO | LDO electrode fluorescence | Dissolved oxygen meter (HQ, 30d) |
| pH | Glass electrode method | ZD-2 automatic potentiometer |
| T | Thermometer |
