281.5 g/kg = 282.879 PSU
| g/kg | PSU |
|---|---|
| 266.5 g/kg | 267.806 |
| 271.5 g/kg | 272.83 |
| 276.5 g/kg | 277.855 |
| 281.5 | 282.879 |
| 286.5 g/kg | 287.904 |
| 291.5 g/kg | 292.928 |
| 296.5 g/kg | 297.953 |
281.5 g/kg = 282.879 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)