Derivative Spectrophotometric Determination of Iron(II) Using Diacetylmonoxime Benzoyl Hydrazone

Abstract

Diacetylmonoxime benzoyl hydrazone is a chromogenic reagent for the determination of Fe(II) and gives a yellow coloured water-soluble complex with Fe(II) in acidic buffer medium (pH 6.25). The molar absorptivity and Sandell’s sensitivity of the complex at l_max 360 nm is found to be 1.25 × 10⁴ L mol^–1 cm^–1 and 0.0045 μg/cm² of Fe(II) respectively. Beer's law validity range is from 0.11–2.24 μg/mL. Iron(II) gives 1 : 1 (M : L) complex with diacetylmonoxime benzoyl hydrozone and stability constant of the complex is 1.1 × 10⁴. The developed direct and first order derivative spectrophotometric method was employed for the determination of iron in alloy samples and effect of various diverse ions is also studied.