315.5 g/kg = 317.046 PSU
| g/kg | PSU |
|---|---|
| 300.5 g/kg | 301.972 |
| 305.5 g/kg | 306.997 |
| 310.5 g/kg | 312.021 |
| 315.5 | 317.046 |
| 320.5 g/kg | 322.07 |
| 325.5 g/kg | 327.095 |
| 330.5 g/kg | 332.119 |
315.5 g/kg = 317.046 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)