Analytical Sciences

A Facile Spectrophotometric Method for Cobalt Determination Using α-Benzilmonoxime in Sodium Dodecylsulfate Micellar Solutions

Habibollah ESKANDARI  and Gholam Hassan Imanzadeh KARKARAGH

Department of Chemistry, Faculty of Basic Sciences, University of Mohaghegh Ardebili, Ardebil 179, Iran

α-Benzilmonoxime in sodium dodecylsulfate micellar media has been used for the spectrophotometric determination of cobalt at pH 9.0. The linear range of calibration is 0.05 - 1.50 μg cm^-3 of cobalt at 380 nm with molar absorptivity of 3.72 x 10⁴ dm³ mol^-1 cm^-1, which is about 1.5-times greater than that of the α-benzilmonoxime extraction based method. The relative standard deviations, recoveries, detection limit and effects of diverse ions on the determination of cobalt were studied. These analytical results were satisfactory. The method was successfully applied to the determination of cobalt in the various samples.

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