| APCI | Atmospheric pressure chemical ionization |
| ESI | Electron spray ion |
| LC-MS/MS | Liquid Chromatography–Tandem Mass Spectrometry |
| LOD | Limit of detection |
| LOQ | Limit of quantitation |
| NDBA | N-nitrosodibutylamine |
| NDEA | N-nitrosodiethylamine |
| NDMA | N-nitrosodimethylamine |
| NMBA | N-nitroso-N-methyl-4-aminobutyric acid |
| RSD | relative standard deviation |
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