540.5 mg/L = 540.5 ppm
| mg/L | ppm |
|---|---|
| 525.5 mg/L | 525.5 |
| 530.5 mg/L | 530.5 |
| 535.5 mg/L | 535.5 |
| 540.5 | 540.5 |
| 545.5 mg/L | 545.5 |
| 550.5 mg/L | 550.5 |
| 555.5 mg/L | 555.5 |
540.5 mg/L = 540.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm