291.5 g/kg = 292.928 PSU
| g/kg | PSU |
|---|---|
| 276.5 g/kg | 277.855 |
| 281.5 g/kg | 282.879 |
| 286.5 g/kg | 287.904 |
| 291.5 | 292.928 |
| 296.5 g/kg | 297.953 |
| 301.5 g/kg | 302.977 |
| 306.5 g/kg | 308.002 |
291.5 g/kg = 292.928 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)