## interparticle volume of the column, $$V_{0}$$

in chromatography
https://doi.org/10.1351/goldbook.I03116
The volume occupied by the mobile phase between the particles in the packed section of a column. It is also called the interstitial volume or the void volume of the column. In liquid chromatography, the interparticle volume is equal to the mobile-phase hold-up volume (V M) in the ideal case, neglecting any extra-column volume. In gas chromatography, the symbol V G may be used for the interparticle volume of the column. In the ideal case, neglecting any extra-column volume, V G is equal to the corrected gas hold-up volume (V M o). $V_{\text{G}}=V_{\text{M}}^{\text{o}}=V_{\text{M}j}$
Source:
PAC, 1993, 65, 819. 'Nomenclature for chromatography (IUPAC Recommendations 1993)' on page 832 (https://doi.org/10.1351/pac199365040819)