| Interferent |
| ||
| I | II | III | |
| Glycine | 6.8 × 10−3 | 1.5 × 10−3 | 2.2 × 10−3 |
| Arginin | 5.8 × 10−3 | 1.0 × 10−3 | 1.9 × 10−3 |
| Sodium glutmate | 1.4 × 10−2 | 5.2 × 10−3 | 6.3 × 10−3 |
| Ephedrine | 1.4 × 10−2 | 5.2 × 10−3 | 6.3 × 10−3 |
| Pilocarpine | 2.4 × 10−2 | 2.9 × 10−3 | 3.5 × 10−3 |
| Atropine | 2.6 × 10−2 | 1.0 × 10−2 | 1.2 × 10−2 |
| Quinine | 2.8 × 10−1 | 2.2 × 10−1 | 2.3 × 10−1 |
| Caffeine | 2.0 × 10−3 | 4.3 × 10−4 | 5.9 × 10−4 |
| KCL | 1.37 × 10−4 | 1.68 × 10−4 | 1.62 × 10−4 |
| NaNO3 | 4.99 × 10−5 | 6.23 × 10−5 | 6.33 × 10−5 |
| LiNO3 | 3.23× 10−5 | 4.21 × 10−5 | 4.67 × 10−5 |
| CaCl2 | 2.96 × 10−5 | 3.7 × 10−5 | 2.51 × 10−5 |
| Mg(NO3)2 | 2.02 × 10−5 | 2.66 × 10−5 | 2.15 × 10−5 |
| NH4NO3 | 3.13 × 10−5 | 4.64 × 10−5 | 4.65 × 10−5 |
| Ba(NO3)2 | 1.83 × 10−5 | 2.15 × 10−5 | 1.59 × 10−5 |