682.5 PSU = 679.1721 g/kg
| PSU | g/kg |
|---|---|
| 667.5 PSU | 664.2452 |
| 672.5 PSU | 669.2208 |
| 677.5 PSU | 674.1964 |
| 682.5 PSU | 679.1721 |
| 687.5 PSU | 684.1477 |
| 692.5 PSU | 689.1233 |
| 697.5 PSU | 694.0989 |
682.5 PSU = 679.1721 g/kg
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)