277.5 mg/L = 277.5 ppm
| mg/L | ppm |
|---|---|
| 262.5 mg/L | 262.5 |
| 267.5 mg/L | 267.5 |
| 272.5 mg/L | 272.5 |
| 277.5 | 277.5 |
| 282.5 mg/L | 282.5 |
| 287.5 mg/L | 287.5 |
| 292.5 mg/L | 292.5 |
277.5 mg/L = 277.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm