346.5 mg/L = 346.5 ppm
| mg/L | ppm |
|---|---|
| 331.5 mg/L | 331.5 |
| 336.5 mg/L | 336.5 |
| 341.5 mg/L | 341.5 |
| 346.5 | 346.5 |
| 351.5 mg/L | 351.5 |
| 356.5 mg/L | 356.5 |
| 361.5 mg/L | 361.5 |
346.5 mg/L = 346.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm