623.5 mg/L = 623.5 ppm
| mg/L | ppm |
|---|---|
| 608.5 mg/L | 608.5 |
| 613.5 mg/L | 613.5 |
| 618.5 mg/L | 618.5 |
| 623.5 | 623.5 |
| 628.5 mg/L | 628.5 |
| 633.5 mg/L | 633.5 |
| 638.5 mg/L | 638.5 |
623.5 mg/L = 623.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm