AbstractThe migration order of strontium and barium ions in aqueous citric acid solutions was reversed and the complete separation was found to be possible by the addition of methanol, ethanol, or isopropanol. The relative velocity of strontium to barium ions increases with the increasing proportion of alcohols to aqueous solutions. Separation of these ions from each other has been carried out at the field strength of 10, 20, and 37 volt/cm. At 37 volt/cm, strontium and barium ions were separated completely within 1, 2.5, and 6 hours in 80% methanol, ethanol, and isopropanoi solutions, respectively. The migration distances of strontium and barium ions in these solutions have been found to be 16.5, 13.2; 21, 12 and 24, 15 cm, respectively. The readiness for the separation depends on the use of solvents and decreases in the order of methanol, ethanol and 2‐propanol. The increase in partition coefficients is attributed to the addition of alcohol