“…Several analytical techniques have been used for quantification of cefoperazone sodium in pharmaceutical formulations and human biological fluids. These included spectrophotometry 2-6 , spectrofluorimetry 7,8 , colorimetry 9 , capillary zone electrophoresis 10 , voltammetry 11,12 and high-performance liquid chromatography [13][14][15][16][17][18] . In this work, a new spectrophotometric procedure for the determination of cefoperazone based on the formation of binary complex Fe(III)-sulfosalicylic acid.…”