431.5 mg/L = 431.5 ppm
| mg/L | ppm |
|---|---|
| 416.5 mg/L | 416.5 |
| 421.5 mg/L | 421.5 |
| 426.5 mg/L | 426.5 |
| 431.5 | 431.5 |
| 436.5 mg/L | 436.5 |
| 441.5 mg/L | 441.5 |
| 446.5 mg/L | 446.5 |
431.5 mg/L = 431.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm