| Acronym | Meaning |
| AEPS | Auger Electron Appearance Potential Spectroscopy |
| SUP-CI | Superdirect CI |
| RQ | Reportable Quantity |
| BCKD | Branched-chain Alpha-ketoacid Dehydrogenase |
| NRFE | Normalised Relative Fit Error |
| MVC | Mechanical Vapor Compression |
| OC | Oxygen Consumed |
| DPA | Destructive Physical Analysis |
| ILDA | Intensified Linear Diode Array |
| FCA | Frozen-core Appproximation |