676.5 g/kg = 679.815 PSU
| g/kg | PSU |
|---|---|
| 661.5 g/kg | 664.741 |
| 666.5 g/kg | 669.766 |
| 671.5 g/kg | 674.79 |
| 676.5 | 679.815 |
| 681.5 g/kg | 684.839 |
| 686.5 g/kg | 689.864 |
| 691.5 g/kg | 694.888 |
676.5 g/kg = 679.815 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)