574.5 g/kg = 577.315 PSU
| g/kg | PSU |
|---|---|
| 559.5 g/kg | 562.242 |
| 564.5 g/kg | 567.266 |
| 569.5 g/kg | 572.291 |
| 574.5 | 577.315 |
| 579.5 g/kg | 582.34 |
| 584.5 g/kg | 587.364 |
| 589.5 g/kg | 592.389 |
574.5 g/kg = 577.315 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)