| Accuracy (%) n = 3 | NDMA | NMEA | NDEA | NPIP | NPYR | NMOR |
| Mixed―2 ng/mL | 99.9 | 95.5 | 95.4 | 94.8 | 96.2 | 94.2 |
| Mixed―100 ng/mL | 100 | 101 | 100 | 101 | 98.7 | 102 |
| Mixed―200 ng/mL | 101 | 103 | 101 | 100 | 98.7 | 102 |
| Individual―2 ng/mL | 95.7 | 94.7 | 96.7 | 98.0 | ||
| Individual―100 ng/mL | 94.3 | 99.1 | 96.8 | 104 | ||
| Individual―200 ng/mL | 96.7 | 101 | 98.8 | 104 |