720.5 g/kg = 724.03 PSU
| g/kg | PSU |
|---|---|
| 705.5 g/kg | 708.957 |
| 710.5 g/kg | 713.981 |
| 715.5 g/kg | 719.006 |
| 720.5 | 724.03 |
| 725.5 g/kg | 729.055 |
| 730.5 g/kg | 734.079 |
| 735.5 g/kg | 739.104 |
720.5 g/kg = 724.03 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)