Efficient column has small plate height-less zone broadening H=g2 [cm2] L Units H=cm [cm] Experimentally,H and N can be approximated from the width of the base of the chromatographic peak 2 L D N≈1 6 CEM 333 page 14.9Efficient column has small plate height - less zone broadening H = s 2 L [cm2 ] [cm] Units H = cm Experimentally, H and N can be approximated from the width of the base of the chromatographic peak N »16 tR WB æ è ç ö ø ÷ 2 CEM 333 page 14.9