289.5 g/kg = 290.919 PSU
| g/kg | PSU |
|---|---|
| 274.5 g/kg | 275.845 |
| 279.5 g/kg | 280.87 |
| 284.5 g/kg | 285.894 |
| 289.5 | 290.919 |
| 294.5 g/kg | 295.943 |
| 299.5 g/kg | 300.968 |
| 304.5 g/kg | 305.992 |
289.5 g/kg = 290.919 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)