In liquid chromatography plate height divided by average particle diameter.
\[h = H/d_{\rm{p}}\]Note: For open-tubular columns
\(h\) is the plate height divided by the
column diameter,
\(h = H/d_{\rm{c}}\).
Source:
PAC, 2017, 90, 181. 'Terminology of separation methods (IUPAC Recommendations 2017)' on page 201 (https://doi.org/10.1515/pac-2017-0111)