A novel method has been developed for the extraction of Pd/II/ with 1,2,3-benzotriazole /1,2,3-BT/ into methyl isobutyl ketone /MIBK/ at a pH of 4.0. The effects of pH, time of equilibration, solvent, anions and cations on the extraction coefficient have been evaluated. The stoichiometry of the extracted species of 12 was obtained by the slope ratio method and by the method of substoichiometric extraction. Separation factors and decontamination factors for a number of elements in the extraction of Pd/II/ were also obtained.