274.5 g/kg = 275.845 PSU
| g/kg | PSU |
|---|---|
| 259.5 g/kg | 260.772 |
| 264.5 g/kg | 265.796 |
| 269.5 g/kg | 270.821 |
| 274.5 | 275.845 |
| 279.5 g/kg | 280.87 |
| 284.5 g/kg | 285.894 |
| 289.5 g/kg | 290.919 |
274.5 g/kg = 275.845 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)