823.5 ppm = 823,500 ppb
| ppm | ppb |
|---|---|
| 808.5 ppm | 808,500 |
| 813.5 ppm | 813,500 |
| 818.5 ppm | 818,500 |
| 823.5 ppm | 823,500 |
| 828.5 ppm | 828,500 |
| 833.5 ppm | 833,500 |
| 838.5 ppm | 838,500 |
823.5 ppm = 823,500 ppb
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm