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| Parameter | Spectrophotometric pHT and AT uncertainty (%) | Electrode pHNBS and AT uncertainty (%) | NDIR CO2 equilibrator uncertainty (%) |
|---|---|---|---|
| pCO2 | 4.6 | 3.6 | 3.5 |
| Ωar | 3.3 | 2.7 | 2.7 |
| [H+] | 3.9 | 3.1 | 3.0 |
