537.5 g/kg = 540.134 PSU
| g/kg | PSU |
|---|---|
| 522.5 g/kg | 525.06 |
| 527.5 g/kg | 530.085 |
| 532.5 g/kg | 535.109 |
| 537.5 | 540.134 |
| 542.5 g/kg | 545.158 |
| 547.5 g/kg | 550.183 |
| 552.5 g/kg | 555.207 |
537.5 g/kg = 540.134 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)