Method of transferring a target substance between two liquid phases (4, 6; 6, 8; 6, 11), of which at least one phase (4, 6) comprises the target substance to be transferred and at least one phase (4, 8, 11) is an aqueous phase, where at least the aqueous phase (4, 8, 11) is disposed in one of two electrode chambers (1a, 1b, 10a, 10b) that are separated in terms of their volumes and are electrically conductively connected by charge carrier exchange, or where the phases (4, 6; 6, 8; 6, 11) are collectively disposed in one of two electrically conductively connected electrode chambers (1a, 1b, 10a, 10b) that are separated in terms of their volumes, and a change in pH is generated in the aqueous phase (4, 8, 11) by the H and/or OH ions formed in the electrolysis, which initiates a process of transfer of the target substance between the phases (4, 6; 6, 8; 6, 11) when the phases come into contact or are brought into contact, characterized in that a. in a first method step, a first phase is formed by an aqueous solution of an acid as target molecule and a second phase i. comprises a reactive extractant as binding partner and/or ii. comprises an organic solvent, where the acid is protonated in the anode chamber of both electrode chambers (1a, 1b) and iii. is added reactively onto the reactive extractant or iv. goes into solution in the organic solvent, in which the protonated acid has higher solubility compared to the deprotonated acid, and is thereby transferred from the first phase into the second phase, b. in a second method step, a first phase i. is formed by a complex of a reactive extractant as binding partner and a protonated acid bound thereto as target molecule, or ii. is formed by an organic solvent in which a protonated acid is dissolved, or iii. is formed by a mixture of reactive extractant and organic solvent, with occurrence of one or both effects mentioned in i) or ii), and the second phase comprises water (8, 11), where the protonated acid is deprotonated in the cathode chamber of the two electrode chambers (10a, 10b), and iv. is split off from the reactive extractant by the breaking of the bonds and/or v. goes into solution in the aqueous phase (8, 11), and is thereby transferred from the first phase into the second phase (8, 11), c. wherein the second method step b) is conducted after or simultaneously with the first method step a), and the second phase of the first method step a) forms the first phase of the second method step b). a. in a first method step, a first phase is formed by an aqueous solution of an acid as target molecule and a second phase i. comprises a reactive extractant as binding partner and/or ii. comprises an organic solvent, where the acid is protonated in the anode chamber of both electrode chambers (1a, 1b) and iii. is added reactively onto the reactive extractant or iv. goes into solution in the organic solvent, in which the protonated acid has higher solubility compared to the deprotonated acid, and is thereby transferred from the first phase into the second phase, i. comprises a reactive extractant as binding partner and/or ii. comprises an organic solvent, where the acid is protonated in the anode chamber of both electrode chambers (1a, 1b) and iii. is added reactively onto the reactive extractant or iv. goes into solution in the organic solvent, in which the protonated acid has higher solubility compared to the deprotonated acid, b. in a second method step, a first phase i. is formed by a complex of a reactive extractant as binding partner and a protonated acid bound thereto as target molecule, or ii. is formed by an organic solvent in which a protonated acid is dissolved, or iii. is formed by a mixture of reactive extractant and organic solvent, with occurrence of one or both effects mentioned in i) or ii), and the second phase comprises water (8, 11), where the protonated acid is deprotonated in the cathode chamber of the two electrode chambers (10a, 10b), and iv. is split off from the reactive extractant by the breaking of the bonds and/or v. goes into solution in the aqueous phase (8, 11), and is thereby transferred from the first phase into the second phase (8, 11), i. is formed by a complex of a reactive extractant as binding partner and a protonated acid bound thereto as target molecule, or ii. is formed by an organic solvent in which a protonated acid is dissolved, or iii. is formed by a mixture of reactive extractant and organic solvent, with occurrence of one or both effects mentioned in i) or ii), and the second phase comprises water (8, 11), where the protonated acid is deprotonated in the cathode chamber of the two electrode chambers (10a, 10b), and iv. is split off from the reactive extractant by the breaking of the bonds and/or v. goes into solution in the aqueous phase (8, 11), c. wherein the second method step b) is conducted after or simultaneously with the first method step a), and the second phase of the first method step a) forms the first phase of the second method step b).