Spectrophotometric determination of cerium(IV) using potassium ferrocyanide as an analytical reagent

Department of Chemistry, Kurukshetra University, Kurukshetra-136 119, Haryana, India

Manuscript received 14 February 2005, revised 21 March 2006, accepted 27 March 2006

Potassium ferrocyanide is used in the determination of cerium(IV) spectrophotometrically. It forms a greenish yellow complex in dilute acetic acid solution with \(\lambda_{max}\) at 425 nm. The method is free from interference of a large number of metal ions. Molar absorptivity and Sandell's sensitivity of the formed complex are 6.0 x 10³ L mol^-1 cm^-1 and 0.023 μg cm^-2, respectively.