Kinetic - Spectrophotometric determination of manganese(II) at the nanogram level based on its catalytic effect on the oxidation of an azo dye with hydrogen peroxide

Pedro Tarin, Marcelo Blancot

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15 Citations (Scopus)

Abstract

A catalytic method for the determination of trace amounts of manganese(II) based on its catalytic effect on the oxidation of 3-(2-hydroxyphenylazo)pyridine-2,6-diol is proposed. The synthesis of this dye is described and the reaction is monitored spectrophotometrically by measuring the absorbance of the dye at 472 nm. The kinetic parameters of the reaction have been determined. The calibration graph [tan a vs. manganese(II) concentration] is linear in the range 0.5-9.1 ng ml-1 of manganese(II), the relative standard deviation being 3.7% for 2.23 ng ml-1. The method has few interferences and has been applied to the determination of manganese(II) in foodstuffs. © 1988 by the Royal Society of Chemistry. All rights reserved.
Original languageEnglish
Pages (from-to)433-436
JournalAnalyst
Volume113
Issue number3
DOIs
Publication statusPublished - 1 Jan 1988

Keywords

  • 3-(2-hydroxyphenylazo)pyridine-2,6-diol
  • Catalytic method
  • Hydrogen peroxide
  • Manganese(II) determination

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