resistivity, ρ in gas chromatography

https://dx.doi.org/10.1351/goldbook.R05316
Electric field strength divided by the current density. This quantity is a tensor in an anisotropic medium.
Source:
PAC, 1996, 68, 957 (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 990