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Analytical Method Development for Extractive Spectrophotometric Determination of Nickel using Bis [3-Hydroxyimino-5-methyl-N-methyl]-2-imine as a New Analytical Reagent

R. S. Lokhande, V. R. Patil, P. P. Shevde and S. M. Lele

Bis [3-hydroxyimino-5-methyl-N-methyl]-2-imine (HIMMI) is proposed as a new sensitive and selective reagent for the spectrophotometric determination of nickel. The reagent reacts with nickel in the pH range 9.0 to 9.4 to form a yellow colored 1 : 1 chelate, which is very well extracted in n-butanol. Beer’s law is obeyed in the concentration range 0.01-40.00 µg mL-1 nickel. The molar absorptivity and Sandell’s sensitivity of the extracted species are 1.4297 x 103 Lit mol-1 cm-1 and 4.10 x 10-3 µg cm-2 , respectively at 415 nm. The proposed method is highly sensitive, selective, simple, rapid, accurate, and has been satisfactorily applied for the determination of nickel in the synthetic mixtures, vegetable oil and alloys.