| b | phase ratio (ratio of the concentrations of a compound in the mobile and stationary phases) |
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| l | statistical irregulation of the package |
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| A | Eddy diffusion (package factor) inside the column package |
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| NPD | nitrogen-phosphorous detector |
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| FPD | flame photometric detector |
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| TCD | thermal conductivity detector |
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| PID | photoionization detector |
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| MS | mass selective detector |
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| B | axiale molecular diffusion in the mobile phase |
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| Dm | diffusion coefficient of the mobile phase |
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| g | labyrinth factor of the pores |
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| BTX | Benzene, Toluene, o-, m-, p-Xylene |
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| C | mass transfer coefficient in the mobile and stationary phase |
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| dP | particle size |
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| DS | diffusion coefficient of the stationary phase |
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| ECD | electron catch detector |
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| FID | flame ionisation detector |
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| GC | gas chromatography |
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| h | height of a signal |
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| HETP | height equivalent of a theoretical plate |
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| HPLC | high performance liquid chromatography |
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| I.D. | inner diameter |
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| IC | ion chromatography |
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| k' | capacity factor |
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| K | distribution coefficient |
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| tM | "death time" (retention time in the mobile phase) |
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| tR | total retention time of the compound (in the whole chromatographic system) |
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| t'R | adjusted retention time of the compound (retention time in the stationary phase) |
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| û | average linear velocity (cm/sec) |
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| UV-VIS | ultraviolet-visible |
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| VL | volume of the stationary phase |
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| VM | volume flow rate |
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| VR | total retention volume |
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| V'R | adjusted retention volume |
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| W0.5 | peak width at half height |
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