340.5 g/kg = 342.168 PSU
| g/kg | PSU |
|---|---|
| 325.5 g/kg | 327.095 |
| 330.5 g/kg | 332.119 |
| 335.5 g/kg | 337.144 |
| 340.5 | 342.168 |
| 345.5 g/kg | 347.193 |
| 350.5 g/kg | 352.217 |
| 355.5 g/kg | 357.242 |
340.5 g/kg = 342.168 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)