581.5 mg/L = 581.5 ppm
| mg/L | ppm |
|---|---|
| 566.5 mg/L | 566.5 |
| 571.5 mg/L | 571.5 |
| 576.5 mg/L | 576.5 |
| 581.5 | 581.5 |
| 586.5 mg/L | 586.5 |
| 591.5 mg/L | 591.5 |
| 596.5 mg/L | 596.5 |
581.5 mg/L = 581.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm