| Acronym | Meaning |
| HRGS | High-resolution Gamma-ray Spectrometry |
| SOA | Semiconductor Optical Amplifier |
| APHEA2 | Air Pollution And Health: A European Approach 2 |
| XRD | X-ray Diffraction Analysis |
| CBN | Cubic Boron Nitride |
| ACL | Alternative Concentration Limit |
| ACC | 1-aminocyclopropane-1-carboxylic Acid |
| EACN | European Air Chemistry Network |
| EDD | Enforcement Decision Document |
| IE | Ionization Energy |