338.5 g/kg = 340.159 PSU
| g/kg | PSU |
|---|---|
| 323.5 g/kg | 325.085 |
| 328.5 g/kg | 330.11 |
| 333.5 g/kg | 335.134 |
| 338.5 | 340.159 |
| 343.5 g/kg | 345.183 |
| 348.5 g/kg | 350.208 |
| 353.5 g/kg | 355.232 |
338.5 g/kg = 340.159 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)