318.5 g/kg = 320.061 PSU
| g/kg | PSU |
|---|---|
| 303.5 g/kg | 304.987 |
| 308.5 g/kg | 310.012 |
| 313.5 g/kg | 315.036 |
| 318.5 | 320.061 |
| 323.5 g/kg | 325.085 |
| 328.5 g/kg | 330.11 |
| 333.5 g/kg | 335.134 |
318.5 g/kg = 320.061 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)