168.5 mg/L = 168.5 ppm
| mg/L | ppm |
|---|---|
| 153.5 mg/L | 153.5 |
| 158.5 mg/L | 158.5 |
| 163.5 mg/L | 163.5 |
| 168.5 | 168.5 |
| 173.5 mg/L | 173.5 |
| 178.5 mg/L | 178.5 |
| 183.5 mg/L | 183.5 |
168.5 mg/L = 168.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm