771.5 PSU = 767,738.1 ppm
| PSU | ppm |
|---|---|
| 756.5 PSU | 752,811.2 |
| 761.5 PSU | 757,786.8 |
| 766.5 PSU | 762,762.5 |
| 771.5 PSU | 767,738.1 |
| 776.5 PSU | 772,713.7 |
| 781.5 PSU | 777,689.3 |
| 786.5 PSU | 782,664.9 |
771.5 PSU = 767,738.1 ppm
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)