A new and fast solvent microextraction method, termed rotative liquid-liquid microextraction (RLLME), has been introduced and used for real sample analysis. RLLME in combination with fiber optic-linear array detection spectrophotometry was used for pharmaceutical sample analysis. The proposed method was compared with other methods and its applicability was evaluated by the determination of cobalt in pharmaceutical samples including B-12 ampoule, B-complex ampoule, and Neobion ampoule, as well as Centrum capsule as a nutritive supplement. Accuracy of the method was proved using certified reference material.Under the optimum conditions, the preconcentration time was 30 s, which is one of the shortest preconcentration times reported to date. The calculated calibration curves gave high levels of correlation coefficients (r(2)) greater than 0.9993, the limit of detection (LOD) of the method was 0.12 ng mL(-1), and the relative standard deviation (R.S.D.) was 1.9 % for 50 ng mL(-1) cobalt.