<p>An approximate expression is derived for the sedimentation potential (field) in a dilute suspension of weakly charged spherical liquid drops dispersed in an electrolyte solution under gravity, where the drop surface charge arises from ion adsorption. The derivation is based on the electrophoresis theory for liquid drops developed by Baygents and Saville, which accounts for the Marangoni effect induced by interfacial tension gradients. A simplified case is considered, in which no ions are present inside the drops. The result demonstrates that the Onsager relation between sedimentation and electrophoresis is satisfied in the present system.</p> Graphical Abstract <p></p>