679.5 PSU = 676,186.7 mg/L
| PSU | mg/L |
|---|---|
| 664.5 PSU | 661,259.8 |
| 669.5 PSU | 666,235.4 |
| 674.5 PSU | 671,211.1 |
| 679.5 PSU | 676,186.7 |
| 684.5 PSU | 681,162.3 |
| 689.5 PSU | 686,137.9 |
| 694.5 PSU | 691,113.5 |
679.5 PSU = 676,186.7 mg/L
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)