279.5 mg/L = 279.5 ppm
| mg/L | ppm |
|---|---|
| 264.5 mg/L | 264.5 |
| 269.5 mg/L | 269.5 |
| 274.5 mg/L | 274.5 |
| 279.5 | 279.5 |
| 284.5 mg/L | 284.5 |
| 289.5 mg/L | 289.5 |
| 294.5 mg/L | 294.5 |
279.5 mg/L = 279.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm