590.5 g/kg = 593.393 PSU
| g/kg | PSU |
|---|---|
| 575.5 g/kg | 578.32 |
| 580.5 g/kg | 583.344 |
| 585.5 g/kg | 588.369 |
| 590.5 | 593.393 |
| 595.5 g/kg | 598.418 |
| 600.5 g/kg | 603.442 |
| 605.5 g/kg | 608.467 |
590.5 g/kg = 593.393 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)