677.5 mg/L = 677.5 ppm
| mg/L | ppm |
|---|---|
| 662.5 mg/L | 662.5 |
| 667.5 mg/L | 667.5 |
| 672.5 mg/L | 672.5 |
| 677.5 | 677.5 |
| 682.5 mg/L | 682.5 |
| 687.5 mg/L | 687.5 |
| 692.5 mg/L | 692.5 |
677.5 mg/L = 677.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm