Ihe electrocmwtic flow mobility has been rneanved by the combition of monitoring the change in elechic current during electrophoretic run and operathe wavelet transform. Once the sample solvent zone with different ionic strength from background electrolyte migrated from the capillary, a sudden change in current d d be observed from the electric current record of time history. The exact time (in the middle of abrupt range) corresponding to the abrupt change in current was determined by wavelet tramform. This work showed that the electmommtic flow mobility determined by the proposed method was in a good agreement with the neutral mark-ments for true neutrality, detectability , and inertness tow a d the capillary wall are among the major limitations associated with this method. Recently many approaches*-= have been proposed aa alternatives to the neutral marker method to estimate electroosmosis in capillary. All of these procedures have been demonstrated to give the reliable measurements of eletroosmotic flow rate, provided that some cares are taken. In this paper, the performance of a new method capable of measuring the electnmsmotic flow in CE based er method commonly used. K e W o d trucsmosis measurement, abrupt change of current on the abrupt change of current by wavelet transform of de-noising was described. In electrophoresis experiments, under the action of the applied elect& field, the electrolyte moves toward one end of the capillary, and capillary elmwPhomis* wavelet m f o m t elm-* t 'The current ad&: Depnrtment of. C h e m i s~, Hehi L'niienity, C h m .