Spectrophotometric Determination of Ni+2 by 3- ((2- Hydroxyphenyl) imino) indolin- 2- one

Abstract

3- ((2- Hydroxyphenyl) imino) indolin- 2- one was prepared by reacting isatin with 2- aminophenol(HIAP),The reagent was characterized by IR, H ¹NMR spectrum, This reagent with a nickel complex forms a violet color (1: 2) at pH = 9.0, λ_max =575nm and room temperature using sodium tetraborate buffer solution, The molar absorptivity 1.43 10⁺⁴ L mol^{- 1} cm^{- 1} and Sandell’s sensitivity value is 0.03800 μg cm^{- 2} and The Beer’s law is obeyed in the range 0.50- 5.28 μg mL^{- 1} of nickel (II) and the Calibration curve equation y = 0.0663x + 0.0749, R² = 0.9988.