Volume of the mobile phase within the pores of the particles in the stationary phase.
Note: The
retention time equivalent to
\(V_{\rm{i}}\) is
\(t_{\rm{i}}\) \[t_{\rm{i}} = \frac{V_{\rm{i}}}{F_{\rm{c}}}\] Source:
PAC, 2017, 90, 181. 'Terminology of separation methods (IUPAC Recommendations 2017)' on page 210 (https://doi.org/10.1515/pac-2017-0111)