331.5 mg/L = 331.5 ppm
| mg/L | ppm |
|---|---|
| 316.5 mg/L | 316.5 |
| 321.5 mg/L | 321.5 |
| 326.5 mg/L | 326.5 |
| 331.5 | 331.5 |
| 336.5 mg/L | 336.5 |
| 341.5 mg/L | 341.5 |
| 346.5 mg/L | 346.5 |
331.5 mg/L = 331.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm