351.5 mg/L = 351.5 ppm
| mg/L | ppm |
|---|---|
| 336.5 mg/L | 336.5 |
| 341.5 mg/L | 341.5 |
| 346.5 mg/L | 346.5 |
| 351.5 | 351.5 |
| 356.5 mg/L | 356.5 |
| 361.5 mg/L | 361.5 |
| 366.5 mg/L | 366.5 |
351.5 mg/L = 351.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm