| ALf | Aluminum (Fine) | µg/m^3 | <-- | AL | ng/m^3 |
| ASf | Arsenic (Fine) | µg/m^3 | <-- | AS | ng/m^3 |
| BRf | Bromine (Fine) | µg/m^3 | <-- | BR | ng/m^3 |
| CAf | Calcium (Fine) | µg/m^3 | <-- | CA | ng/m^3 |
| CLf | Chlorine (Fine) | µg/m^3 | <-- | CL | ng/m^3 |
| CHLf | Chloride (Fine) | µg/m^3 | <-- | CLD | ng/m^3 |
| CRf | Chromium (Fine) | µg/m^3 | <-- | CR | ng/m^3 |
| CUf | Copper (Fine) | µg/m^3 | <-- | CU | ng/m^3 |
| ECf | Carbon, Elemental Total (Fine) | µg/m^3 | <-- | EC | ng/m^3 |
| ECf | Carbon, Elemental Total (Fine) | µg/m^3 | <-- | EC_CIRA | µg/m^3 |
| EC1f | Carbon, Elemental Fraction 1 (Fine) | µg/m^3 | <-- | EC1 | ng/m^3 |
| EC2f | Carbon, Elemental Fraction 2 (Fine) | µg/m^3 | <-- | EC2 | ng/m^3 |
| EC3f | Carbon, Elemental Fraction 3 (Fine) | µg/m^3 | <-- | EC3 | ng/m^3 |
| ECf | Carbon, Elemental Total (Fine) | µg/m^3 | <-- | ECf | µg/m^3 |
| SampDur | Sampling Duration | minutes | <-- | ET | minutes |
| fAbs | Filter Absorption Coefficient | 1/Mm | <-- | fabs | 1/Mm |
| FEf | Iron (Fine) | µg/m^3 | <-- | FE | ng/m^3 |
| FlowRate | Flow Rate | R | <-- | Flow | R |
| Kf | Potassium (Fine) | µg/m^3 | <-- | K | ng/m^3 |
| MF | Mass, PM2.5 (Fine) | µg/m^3 | <-- | MF | ng/m^3 |
| MGf | Magnesium (Fine) | µg/m^3 | <-- | MG | ng/m^3 |
| MNf | Manganese (Fine) | µg/m^3 | <-- | MN | ng/m^3 |
| NAf | Sodium (Fine) | µg/m^3 | <-- | NA | ng/m^3 |
| NIf | Nickel (Fine) | µg/m^3 | <-- | NI | ng/m^3 |
| N2f | Nitrite (Fine) | µg/m^3 | <-- | NO2 | ng/m^3 |
| NO3f | Nitrate (Fine) | µg/m^3 | <-- | NO3 | ng/m^3 |
| OCf | Carbon, Organic Total (Fine) | µg/m^3 | <-- | OC | ng/m^3 |
| OCf | Carbon, Organic Total (Fine) | µg/m^3 | <-- | OC_CIRA | µg/m^3 |
| OC1f | Carbon, Organic Fraction 1 (Fine) | µg/m^3 | <-- | OC1 | ng/m^3 |
| OC2f | Carbon, Organic Fraction 2 (Fine) | µg/m^3 | <-- | OC2 | ng/m^3 |
| OC3f | Carbon, Organic Fraction 3 (Fine) | µg/m^3 | <-- | OC3 | ng/m^3 |
| OC4f | Carbon, Organic Fraction 4 (Fine) | µg/m^3 | <-- | OC4 | ng/m^3 |
| OCf | Carbon, Organic Total (Fine) | µg/m^3 | <-- | OCf | µg/m^3 |
| OP405TR | Organic Pyrolyzed Carbon by Reflectance at 405 nm | µg/m^3 | <-- | OP405TR | ng/m^3 |
| OP405TT | Organic Pyrolyzed Carbon by Transmittance at 405 nm | µg/m^3 | <-- | OP405TT | ng/m^3 |
| OP445TR | Organic Pyrolyzed Carbon by Reflectance at 445 nm | µg/m^3 | <-- | OP445TR | ng/m^3 |
| OP445TT | Organic Pyrolyzed Carbon by Transmittance at 445 nm | µg/m^3 | <-- | OP445TT | ng/m^3 |
| OP532TR | Organic Pyrolyzed Carbon by Reflectance at 532 nm | µg/m^3 | <-- | OP532TR | ng/m^3 |
| OP532TT | Organic Pyrolyzed Carbon by Transmittance at 532 nm | µg/m^3 | <-- | OP532TT | ng/m^3 |
| OP780TR | Organic Pyrolyzed Carbon by Reflectance at 780 nm | µg/m^3 | <-- | OP780TR | ng/m^3 |
| OP780TT | Organic Pyrolyzed Carbon by Transmittance at 780 nm | µg/m^3 | <-- | OP780TT | ng/m^3 |
| OP808TR | Organic Pyrolyzed Carbon by Reflectance at 808 nm | µg/m^3 | <-- | OP808TR | ng/m^3 |
| OP808TT | Organic Pyrolyzed Carbon by Transmittance at 808 nm | µg/m^3 | <-- | OP808TT | ng/m^3 |
| OP980TR | Organic Pyrolyzed Carbon by Reflectance at 980 nm | µg/m^3 | <-- | OP980TR | ng/m^3 |
| OP980TT | Organic Pyrolyzed Carbon by Transmittance at 980 nm | µg/m^3 | <-- | OP980TT | ng/m^3 |
| OPf | Carbon, Organic Pyrolized (Fine), by Reflectance | µg/m^3 | <-- | OPTR | ng/m^3 |
| OPTf | Carbon, Organic Pyrolized (Fine), by Transmittance | µg/m^3 | <-- | OPTT | ng/m^3 |
| Pf | Phosphorus (Fine) | µg/m^3 | <-- | P | ng/m^3 |
| PBf | Lead (Fine) | µg/m^3 | <-- | PB | ng/m^3 |
| MT | Mass, PM10 (Total) | µg/m^3 | <-- | PM10 | ng/m^3 |
| MF | Mass, PM2.5 (Fine) | µg/m^3 | <-- | PM2.5 | ng/m^3 |
| RBf | Rubidium (Fine) | µg/m^3 | <-- | RB | ng/m^3 |
| RefF_405 | Final laser reflectance at 405 nm | (ratio) | <-- | RefF_405 | (ratio) |
| RefF_445 | Final laser reflectance at 445 nm | (ratio) | <-- | RefF_445 | (ratio) |
| RefF_532 | Final laser reflectance at 532 nm | (ratio) | <-- | RefF_532 | (ratio) |
| RefF_635 | Final laser reflectance at 635 nm | (ratio) | <-- | RefF_635 | (ratio) |
| RefF_780 | Final laser reflectance at 780 nm | (ratio) | <-- | RefF_780 | (ratio) |
| RefF_808 | Final laser reflectance at 808 nm | (ratio) | <-- | RefF_808 | (ratio) |
| RefF_980 | Final laser reflectance at 980 nm | (ratio) | <-- | RefF_980 | (ratio) |
| RefI_405 | Initial laser reflectance at 405 nm | (ratio) | <-- | RefI_405 | (ratio) |
| RefI_445 | Initial laser reflectance at 445 nm | (ratio) | <-- | RefI_445 | (ratio) |
| RefI_532 | Initial laser reflectance at 532 nm | (ratio) | <-- | RefI_532 | (ratio) |
| RefI_635 | Initial laser reflectance at 635 nm | (ratio) | <-- | RefI_635 | (ratio) |
| RefI_780 | Initial laser reflectance at 780 nm | (ratio) | <-- | RefI_780 | (ratio) |
| RefI_808 | Initial laser reflectance at 808 nm | (ratio) | <-- | RefI_808 | (ratio) |
| RefI_980 | Initial laser reflectance at 980 nm | (ratio) | <-- | RefI_980 | (ratio) |
| RefM_405 | Minimum laser reflectance at 405 nm | (ratio) | <-- | RefM_405 | (ratio) |
| RefM_445 | Minimum laser reflectance at 445 nm | (ratio) | <-- | RefM_445 | (ratio) |
| RefM_532 | Minimum laser reflectance at 532 nm | (ratio) | <-- | RefM_532 | (ratio) |
| RefM_635 | Minimum laser reflectance at 635 nm | (ratio) | <-- | RefM_635 | (ratio) |
| RefM_780 | Minimum laser reflectance at 780 nm | (ratio) | <-- | RefM_780 | (ratio) |
| RefM_808 | Minimum laser reflectance at 808 nm | (ratio) | <-- | RefM_808 | (ratio) |
| RefM_980 | Minimum laser reflectance at 980 nm | (ratio) | <-- | RefM_980 | (ratio) |
| Sf | Sulfur (Fine) | µg/m^3 | <-- | S | ng/m^3 |
| SEf | Selenium (Fine) | µg/m^3 | <-- | SE | ng/m^3 |
| SIf | Silicon (Fine) | µg/m^3 | <-- | SI | ng/m^3 |
| SO4f | Sulfate (Fine) | µg/m^3 | <-- | SO4 | ng/m^3 |
| SRf | Strontium (Fine) | µg/m^3 | <-- | SR | ng/m^3 |
| TCf | Carbon, Total (Fine) | µg/m^3 | <-- | TC | ng/m^3 |
| TIf | Titanium (Fine) | µg/m^3 | <-- | TI | ng/m^3 |
| TransF_405 | Final laser transmittance at 405 nm | (ratio) | <-- | TransF_405 | (ratio) |
| TransF_445 | Final laser transmittance at 445 nm | (ratio) | <-- | TransF_445 | (ratio) |
| TransF_532 | Final laser transmittance at 532 nm | (ratio) | <-- | TransF_532 | (ratio) |
| TransF_635 | Final laser transmittance at 635 nm | (ratio) | <-- | TransF_635 | (ratio) |
| TransF_780 | Final laser transmittance at 780 nm | (ratio) | <-- | TransF_780 | (ratio) |
| TransF_808 | Final laser transmittance at 808 nm | (ratio) | <-- | TransF_808 | (ratio) |
| TransF_980 | Final laser transmittance at 980 nm | (ratio) | <-- | TransF_980 | (ratio) |
| TransI_405 | Initial laser transmittance at 405 nm | (ratio) | <-- | TransI_405 | (ratio) |
| TransI_445 | Initial laser transmittance at 445 nm | (ratio) | <-- | TransI_445 | (ratio) |
| TransI_532 | Initial laser transmittance at 532 nm | (ratio) | <-- | TransI_532 | (ratio) |
| TransI_635 | Initial laser transmittance at 635 nm | (ratio) | <-- | TransI_635 | (ratio) |
| TransI_780 | Initial laser transmittance at 780 nm | (ratio) | <-- | TransI_780 | (ratio) |
| TransI_808 | Initial laser transmittance at 808 nm | (ratio) | <-- | TransI_808 | (ratio) |
| TransI_980 | Initial laser transmittance at 980 nm | (ratio) | <-- | TransI_980 | (ratio) |
| TransM_405 | Minimum laser transmittance at 405 nm | (ratio) | <-- | TransM_405 | (ratio) |
| TransM_445 | Minimum laser transmittance at 445 nm | (ratio) | <-- | TransM_445 | (ratio) |
| TransM_532 | Minimum laser transmittance at 532 nm | (ratio) | <-- | TransM_532 | (ratio) |
| TransM_635 | Minimum laser transmittance at 635 nm | (ratio) | <-- | TransM_635 | (ratio) |
| TransM_780 | Minimum laser transmittance at 780 nm | (ratio) | <-- | TransM_780 | (ratio) |
| TransM_808 | Minimum laser transmittance at 808 nm | (ratio) | <-- | TransM_808 | (ratio) |
| TransM_980 | Minimum laser transmittance at 980 nm | (ratio) | <-- | TransM_980 | (ratio) |
| Vf | Vanadium (Fine) | µg/m^3 | <-- | V | ng/m^3 |
| ZNf | Zinc (Fine) | µg/m^3 | <-- | ZN | ng/m^3 |
| ZRf | Zirconium (Fine) | µg/m^3 | <-- | ZR | ng/m^3 |