Using a First-Derivative Spectrophotometric Method for Simultaneous Determination of Fe(II) and Ni(II) in Mineral Vitamins by Interaction with 2,4-Diamino-5-(2-hydroxy-5-nitrophenylazo)benzenesulfonic Acid Sodium Salt in the Presence of Tween 20

Author： Hashem Elham Y   Seleim Mohamed M   El-Zohry Ahmed M  

Publisher： AOAC International

ISSN： 1944-7922

Source： Journal of AOAC International, Vol.93, Iss.3, 2010-05, pp. : 833-841

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