698.5 g/kg = 701.923 PSU
| g/kg | PSU |
|---|---|
| 683.5 g/kg | 686.849 |
| 688.5 g/kg | 691.874 |
| 693.5 g/kg | 696.898 |
| 698.5 | 701.923 |
| 703.5 g/kg | 706.947 |
| 708.5 g/kg | 711.972 |
| 713.5 g/kg | 716.996 |
698.5 g/kg = 701.923 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)