The Determination of Ultratrace Amounts of Iron by Catalytic Decolorizing Method as a New Indicator Reaction

Abstract

Abstract: In this paper, that iron(M) can catalyze the decolorizing reaction which results from the oxidation of calconcaboxylic acid sodium salt by hydrogen peroxide in acetic acid is studied. In this method, Sandell sensitivity of catalytic spectrophotometry is 2.92×10^-5μg/cm². Beer's law is obeyed in the range of 0 to 500ng Fe per 25mL.The apparent activation energy of catalytic reaction is 79.80kJ/mol, which was calculated by using Arrhenius Formula. This new method has been successfully applied to the determination of ultratrace amounts of iron in water, foods, and human hair samples, respectively.

Key words: Catalytic spectrophotometry, Calconcabolylic acid sodium salt, Hydrogen peroxide, Decolorizing reaction, Determination of ultratrace amounts of iron

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Zhang Zhenhui . The Determination of Ultratrace Amounts of Iron by Catalytic Decolorizing Method as a New Indicator Reaction[J]. Chem. J. Chinese Universities, 1988, 9(7): 681.

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The Determination of Ultratrace Amounts of Iron by Catalytic Decolorizing Method as a New Indicator Reaction

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