| S/N | Sample Label | Description |
| 1 | Sample 0 | Blank Sample for Calibration |
| 2 | Standard 1 | First Standard Sample of Known Concentration |
| 3 | Standard 2 | Second Standard Sample of known concentration |
| 4 | Standard 3 | Third Standard Sample of known concentration |
| 5 | Standard 4 | Fourth Standard Sample of known concentration |
| 6 | Standard 5 | Fifth Standard Sample of known concentration |
| 7 | WTPI | Wastewater Treatment Plant Inlet |
| 8 | WTPAWW | Wastewater Treatment Plant Aerated Wastewater |
| 9 | FLL | Fresh Landfill Leachate |
| 10 | FHKG | Female Hostel Kitchen Greywater |
| 11 | AUTOSWW | Auto-Service Workshop Wastewater |
| 12 | CWW | Central Workshop Wastewater |
| 13 | FSSE | Foundry Settled Sewage Effluent |
| 14 | CLW | Commercial Laundry Wastewater |
| 15 | FRIW | Foundry Raw Inlet Wastewater |
| 16 | PGGHW | Postgraduate Girls’ Hostel Wastewater |
| 17 | SLL | Stale Landfill Leachate |
| 18 | BHW | Boys’ Hostel Wastewater |