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| interfering ion, B | Nic/TPB | Nic/NB |
|---|---|---|
| dopamine (DA) | –1.95 ± 0.3 | –2.04 ± 0.4 |
| cotinine (Ct) | –3.53 ± 0.4 | –3.64 ± 0.6 |
| CA | –3.98 ± 0.5 | –4.12 ± 0.4 |
| NA | –4.45 ± 0.4 | –4.61 ± 0.3 |
| AA | –4.91 ± 0.1 | –4.88 ± 0.2 |
| GA | –5.1 ± 0.2 | –5.07 ± 0.4 |
| glycine (Gly) | –5.21 ± 0.3 | –5.24 ± 0.2 |
| urea (UA) | –5.32 ± 0.2 | –5.35 ± 0.1 |
| K+ | –5.61 ± 0.2 | –5.60 ± 0.1 |
| Na+ | –5.65 ± 0.1 | –5.61 ± 0.1 |
