Table 2 Multiple reactions monitoring (MRM) transitions and optimized collision energy for four N-nitrosamine GTIs and the internal standard (NDMA-d6)
Analyte | Precursor → product (m/z) | Dwell time (ms) | Collision energy (eV) |
|---|---|---|---|
N-Nitrosodimethylamine-d6 (NDMA-d6) | 80 → 50 | 100 | 5 |
N-Nitrosodimethylamine (NDMA) | 74 → 44 | 150 | 5 |
74 → 42 | 50 | 10 | |
N-Nitrosodiethylamine (NDEA) | 102 → 56 | 150 | 12 |
102 → 85 | 150 | 6 | |
N-Nitrosodiisopropylamine (NDIPA) | 130 → 88 | 150 | 6 |
130 → 42 | 150 | 10 | |
N-nitrosodibutylamine (NDBA) | 158 → 99 | 150 | 10 |
84 → 56 | 150 | 12 |