Mass transfer for kerosene-water system with benzoic acid and n-butyric acid as solutes has been studied in a reciprocating plate column at different operating conditions including the agitation rate of the plate stack, the plate geometry, the flow rates of the phases and the direction of mass transfer. Apparent and true concentration profiles for the dispersed and the continuous phase along the length of the column were generated, taking axial mixing of the phase into consideration. It is noticed that high agitation rate for the plate stack and low free area for the plate give rise to large difference between the apparent and true values. These observations also agree with the data obtained for carbon dioxide — water system studied in a reciprocating plate column.