422.5 mg/L = 422.5 ppm
| mg/L | ppm |
|---|---|
| 407.5 mg/L | 407.5 |
| 412.5 mg/L | 412.5 |
| 417.5 mg/L | 417.5 |
| 422.5 | 422.5 |
| 427.5 mg/L | 427.5 |
| 432.5 mg/L | 432.5 |
| 437.5 mg/L | 437.5 |
422.5 mg/L = 422.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm