287.5 g/kg = 288.909 PSU
| g/kg | PSU |
|---|---|
| 272.5 g/kg | 273.835 |
| 277.5 g/kg | 278.86 |
| 282.5 g/kg | 283.884 |
| 287.5 | 288.909 |
| 292.5 g/kg | 293.933 |
| 297.5 g/kg | 298.958 |
| 302.5 g/kg | 303.982 |
287.5 g/kg = 288.909 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)