312.5 mg/L = 312.5 ppm
| mg/L | ppm |
|---|---|
| 297.5 mg/L | 297.5 |
| 302.5 mg/L | 302.5 |
| 307.5 mg/L | 307.5 |
| 312.5 | 312.5 |
| 317.5 mg/L | 317.5 |
| 322.5 mg/L | 322.5 |
| 327.5 mg/L | 327.5 |
312.5 mg/L = 312.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm