219.5 g/kg = 220.576 PSU
| g/kg | PSU |
|---|---|
| 204.5 g/kg | 205.502 |
| 209.5 g/kg | 210.527 |
| 214.5 g/kg | 215.551 |
| 219.5 | 220.576 |
| 224.5 g/kg | 225.6 |
| 229.5 g/kg | 230.625 |
| 234.5 g/kg | 235.649 |
219.5 g/kg = 220.576 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)