Reading number | Theoretical concentration (ppm) | Titration concentration (ppm) | Externally calibrated cell 2443 reading (ppm) | Externally calibrated cell 2444 reading (ppm) | Externally calibrated cell 2445 reading (ppm) | Internally calibrated cell 2447 reading (ppm) |
1 | 1.0 | 0.7 | 2.1 | 1.2 | 1.3 | 0.8 |
2 | 2.1 | 1.5 | 1.6 | 0.8 | ||
3 | 1.9 | 1.5 | 1.6 | 0.8 |