259.5 g/kg = 260.772 PSU
| g/kg | PSU |
|---|---|
| 244.5 g/kg | 245.698 |
| 249.5 g/kg | 250.723 |
| 254.5 g/kg | 255.747 |
| 259.5 | 260.772 |
| 264.5 g/kg | 265.796 |
| 269.5 g/kg | 270.821 |
| 274.5 g/kg | 275.845 |
259.5 g/kg = 260.772 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)